/**
 * @license Highcharts JS v7.0.1 (2018-12-19)
 * Sonification module
 *
 * (c) 2012-2018 Øystein Moseng
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function (factory) {
	if (typeof module === 'object' && module.exports) {
		module.exports = factory;
	} else if (typeof define === 'function' && define.amd) {
		define(function () {
			return factory;
		});
	} else {
		factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
	}
}(function (Highcharts) {
	var Instrument = (function (H) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Instrument class for sonification module.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */


		/**
		 * A set of options for the Instrument class.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.InstrumentOptionsObject
		 *//**
		 * The type of instrument. Currently only `oscillator` is supported. Defaults
		 * to `oscillator`.
		 * @name Highcharts.InstrumentOptionsObject#type
		 * @type {string|undefined}
		 *//**
		 * The unique ID of the instrument. Generated if not supplied.
		 * @name Highcharts.InstrumentOptionsObject#id
		 * @type {string|undefined}
		 *//**
		 * When using functions to determine frequency or other parameters during
		 * playback, this options specifies how often to call the callback functions.
		 * Number given in milliseconds. Defaults to 20.
		 * @name Highcharts.InstrumentOptionsObject#playCallbackInterval
		 * @type {number|undefined}
		 *//**
		 * A list of allowed frequencies for this instrument. If trying to play a
		 * frequency not on this list, the closest frequency will be used. Set to `null`
		 * to allow all frequencies to be used. Defaults to `null`.
		 * @name Highcharts.InstrumentOptionsObject#allowedFrequencies
		 * @type {Array<number>|undefined}
		 *//**
		 * Options specific to oscillator instruments.
		 * @name Highcharts.InstrumentOptionsObject#oscillator
		 * @type {Highcharts.OscillatorOptionsObject|undefined}
		 */


		/**
		 * Options for playing an instrument.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.InstrumentPlayOptionsObject
		 *//**
		 * The frequency of the note to play. Can be a fixed number, or a function. The
		 * function receives one argument: the relative time of the note playing (0
		 * being the start, and 1 being the end of the note). It should return the
		 * frequency number for each point in time. The poll interval of this function
		 * is specified by the Instrument.playCallbackInterval option.
		 * @name Highcharts.InstrumentPlayOptionsObject#frequency
		 * @type {number|Function}
		 *//**
		 * The duration of the note in milliseconds.
		 * @name Highcharts.InstrumentPlayOptionsObject#duration
		 * @type {number}
		 *//**
		 * The minimum frequency to allow. If the instrument has a set of allowed
		 * frequencies, the closest frequency is used by default. Use this option to
		 * stop too low frequencies from being used.
		 * @name Highcharts.InstrumentPlayOptionsObject#minFrequency
		 * @type {number|undefined}
		 *//**
		 * The maximum frequency to allow. If the instrument has a set of allowed
		 * frequencies, the closest frequency is used by default. Use this option to
		 * stop too high frequencies from being used.
		 * @name Highcharts.InstrumentPlayOptionsObject#maxFrequency
		 * @type {number|undefined}
		 *//**
		 * The volume of the instrument. Can be a fixed number between 0 and 1, or a
		 * function. The function receives one argument: the relative time of the note
		 * playing (0 being the start, and 1 being the end of the note). It should
		 * return the volume for each point in time. The poll interval of this function
		 * is specified by the Instrument.playCallbackInterval option. Defaults to 1.
		 * @name Highcharts.InstrumentPlayOptionsObject#volume
		 * @type {number|Function|undefined}
		 *//**
		 * The panning of the instrument. Can be a fixed number between -1 and 1, or a
		 * function. The function receives one argument: the relative time of the note
		 * playing (0 being the start, and 1 being the end of the note). It should
		 * return the panning value for each point in time. The poll interval of this
		 * function is specified by the Instrument.playCallbackInterval option.
		 * Defaults to 0.
		 * @name Highcharts.InstrumentPlayOptionsObject#pan
		 * @type {number|Function|undefined}
		 *//**
		 * Callback function to be called when the play is completed.
		 * @name Highcharts.InstrumentPlayOptionsObject#onEnd
		 * @type {Function|undefined}
		 */


		/**
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.OscillatorOptionsObject
		 *//**
		 * The waveform shape to use for oscillator instruments. Defaults to `sine`.
		 * @name Highcharts.OscillatorOptionsObject#waveformShape
		 * @type {string|undefined}
		 */




		// Default options for Instrument constructor
		var defaultOptions = {
		    type: 'oscillator',
		    playCallbackInterval: 20,
		    oscillator: {
		        waveformShape: 'sine'
		    }
		};


		/**
		 * The Instrument class. Instrument objects represent an instrument capable of
		 * playing a certain pitch for a specified duration.
		 *
		 * @sample highcharts/sonification/instrument/
		 *         Using Instruments directly
		 * @sample highcharts/sonification/instrument-advanced/
		 *         Using callbacks for instrument parameters
		 *
		 * @requires module:modules/sonification
		 *
		 * @class
		 * @name Highcharts.Instrument
		 *
		 * @param {Highcharts.InstrumentOptionsObject} options
		 *        Options for the instrument instance.
		 */
		function Instrument(options) {
		    this.init(options);
		}
		Instrument.prototype.init = function (options) {
		    if (!this.initAudioContext()) {
		        H.error(29);
		        return;
		    }
		    this.options = H.merge(defaultOptions, options);
		    this.id = this.options.id = options && options.id || H.uniqueKey();

		    // Init the audio nodes
		    var ctx = H.audioContext;
		    this.gainNode = ctx.createGain();
		    this.setGain(0);
		    this.panNode = ctx.createStereoPanner && ctx.createStereoPanner();
		    if (this.panNode) {
		        this.setPan(0);
		        this.gainNode.connect(this.panNode);
		        this.panNode.connect(ctx.destination);
		    } else {
		        this.gainNode.connect(ctx.destination);
		    }

		    // Oscillator initialization
		    if (this.options.type === 'oscillator') {
		        this.initOscillator(this.options.oscillator);
		    }

		    // Init timer list
		    this.playCallbackTimers = [];
		};


		/**
		 * Return a copy of an instrument. Only one instrument instance can play at a
		 * time, so use this to get a new copy of the instrument that can play alongside
		 * it. The new instrument copy will receive a new ID unless one is supplied in
		 * options.
		 *
		 * @function Highcharts.Instrument#copy
		 *
		 * @param {Highcharts.InstrumentOptionsObject} [options]
		 *        Options to merge in for the copy.
		 *
		 * @return {Highcharts.Instrument}
		 *         A new Instrument instance with the same options.
		 */
		Instrument.prototype.copy = function (options) {
		    return new Instrument(H.merge(this.options, { id: null }, options));
		};


		/**
		 * Init the audio context, if we do not have one.
		 * @private
		 * @return {boolean} True if successful, false if not.
		 */
		Instrument.prototype.initAudioContext = function () {
		    var Context = H.win.AudioContext || H.win.webkitAudioContext,
		        hasOldContext = !!H.audioContext;
		    if (Context) {
		        H.audioContext = H.audioContext || new Context();
		        if (
		            !hasOldContext &&
		            H.audioContext &&
		            H.audioContext.state === 'running'
		        ) {
		            H.audioContext.suspend(); // Pause until we need it
		        }
		        return !!(
		            H.audioContext &&
		            H.audioContext.createOscillator &&
		            H.audioContext.createGain
		        );
		    }
		    return false;
		};


		/**
		 * Init an oscillator instrument.
		 * @private
		 * @param {object} oscillatorOptions - The oscillator options passed to
		 * Highcharts.Instrument#init.
		 */
		Instrument.prototype.initOscillator = function (options) {
		    var ctx = H.audioContext;
		    this.oscillator = ctx.createOscillator();
		    this.oscillator.type = options.waveformShape;
		    this.oscillator.connect(this.gainNode);
		    this.oscillatorStarted = false;
		};


		/**
		 * Set pan position.
		 * @private
		 * @param {number} panValue - The pan position to set for the instrument.
		 */
		Instrument.prototype.setPan = function (panValue) {
		    if (this.panNode) {
		        this.panNode.pan.setValueAtTime(panValue, H.audioContext.currentTime);
		    }
		};


		/**
		 * Set gain level. A maximum of 1.2 is allowed before we emit a warning. The
		 * actual volume is not set above this level regardless of input.
		 * @private
		 * @param {number} gainValue - The gain level to set for the instrument.
		 * @param {number} [rampTime=0] - Gradually change the gain level, time given in
		 * milliseconds.
		 */
		Instrument.prototype.setGain = function (gainValue, rampTime) {
		    if (this.gainNode) {
		        if (gainValue > 1.2) {
		            console.warn( // eslint-disable-line
		                'Highcharts sonification warning: ' +
		                'Volume of instrument set too high.'
		            );
		            gainValue = 1.2;
		        }
		        if (rampTime) {
		            this.gainNode.gain.setValueAtTime(
		                this.gainNode.gain.value, H.audioContext.currentTime
		            );
		            this.gainNode.gain.linearRampToValueAtTime(
		                gainValue,
		                H.audioContext.currentTime + rampTime / 1000
		            );
		        } else {
		            this.gainNode.gain.setValueAtTime(
		                gainValue, H.audioContext.currentTime
		            );
		        }
		    }
		};


		/**
		 * Cancel ongoing gain ramps.
		 * @private
		 */
		Instrument.prototype.cancelGainRamp = function () {
		    if (this.gainNode) {
		        this.gainNode.gain.cancelScheduledValues(0);
		    }
		};


		/**
		 * Get the closest valid frequency for this instrument.
		 * @private
		 * @param {number} frequency - The target frequency.
		 * @param {number} [min] - Minimum frequency to return.
		 * @param {number} [max] - Maximum frequency to return.
		 * @return {number} The closest valid frequency to the input frequency.
		 */
		Instrument.prototype.getValidFrequency = function (frequency, min, max) {
		    var validFrequencies = this.options.allowedFrequencies,
		        maximum = H.pick(max, Infinity),
		        minimum = H.pick(min, -Infinity);
		    return !validFrequencies || !validFrequencies.length ?
		            // No valid frequencies for this instrument, return the target
		            frequency :
		            // Use the valid frequencies and return the closest match
		            validFrequencies.reduce(function (acc, cur) {
		                // Find the closest allowed value
		                return Math.abs(cur - frequency) < Math.abs(acc - frequency) &&
		                    cur < maximum && cur > minimum ?
		                    cur : acc;
		            }, Infinity);
		};


		/**
		 * Clear existing play callback timers.
		 * @private
		 */
		Instrument.prototype.clearPlayCallbackTimers = function () {
		    this.playCallbackTimers.forEach(function (timer) {
		        clearInterval(timer);
		    });
		    this.playCallbackTimers = [];
		};


		/**
		 * Set the current frequency being played by the instrument. The closest valid
		 * frequency between the frequency limits is used.
		 * @param {number} frequency - The frequency to set.
		 * @param {object} [frequencyLimits] - Object with maxFrequency and minFrequency
		 */
		Instrument.prototype.setFrequency = function (frequency, frequencyLimits) {
		    var limits = frequencyLimits || {},
		        validFrequency = this.getValidFrequency(
		            frequency, limits.min, limits.max
		        );
		    if (this.options.type === 'oscillator') {
		        this.oscillatorPlay(validFrequency);
		    }
		};


		/**
		 * Play oscillator instrument.
		 * @private
		 * @param {number} frequency - The frequency to play.
		 */
		Instrument.prototype.oscillatorPlay = function (frequency) {
		    if (!this.oscillatorStarted) {
		        this.oscillator.start();
		        this.oscillatorStarted = true;
		    }

		    this.oscillator.frequency.setValueAtTime(
		        frequency, H.audioContext.currentTime
		    );
		};


		/**
		 * Prepare instrument before playing. Resumes the audio context and starts the
		 * oscillator.
		 * @private
		 */
		Instrument.prototype.preparePlay = function () {
		    this.setGain(0.001);
		    if (H.audioContext.state === 'suspended') {
		        H.audioContext.resume();
		    }
		    if (this.oscillator && !this.oscillatorStarted) {
		        this.oscillator.start();
		        this.oscillatorStarted = true;
		    }
		};


		/**
		 * Play the instrument according to options.
		 *
		 * @sample highcharts/sonification/instrument/
		 *         Using Instruments directly
		 * @sample highcharts/sonification/instrument-advanced/
		 *         Using callbacks for instrument parameters
		 *
		 * @function Highcharts.Instrument#play
		 *
		 * @param {Highcharts.InstrumentPlayOptionsObject} options
		 *        Options for the playback of the instrument.
		 */
		Instrument.prototype.play = function (options) {
		    var instrument = this,
		        duration = options.duration || 0,
		        // Set a value, or if it is a function, set it continously as a timer.
		        // Pass in the value/function to set, the setter function, and any
		        // additional data to pass through to the setter function.
		        setOrStartTimer = function (value, setter, setterData) {
		            var target = options.duration,
		                currentDurationIx = 0,
		                callbackInterval = instrument.options.playCallbackInterval;
		            if (typeof value === 'function') {
		                var timer = setInterval(function () {
		                    currentDurationIx++;
		                    var curTime = currentDurationIx * callbackInterval / target;
		                    if (curTime >= 1) {
		                        instrument[setter](value(1), setterData);
		                        clearInterval(timer);
		                    } else {
		                        instrument[setter](value(curTime), setterData);
		                    }
		                }, callbackInterval);
		                instrument.playCallbackTimers.push(timer);
		            } else {
		                instrument[setter](value, setterData);
		            }
		        };

		    if (!instrument.id) {
		        // No audio support - do nothing
		        return;
		    }

		    // If the AudioContext is suspended we have to resume it before playing
		    if (
		        H.audioContext.state === 'suspended' ||
		        this.oscillator && !this.oscillatorStarted
		    ) {
		        instrument.preparePlay();
		        // Try again in 10ms
		        setTimeout(function () {
		            instrument.play(options);
		        }, 10);
		        return;
		    }

		    // Clear any existing play timers
		    if (instrument.playCallbackTimers.length) {
		        instrument.clearPlayCallbackTimers();
		    }

		    // Clear any gain ramps
		    instrument.cancelGainRamp();

		    // Clear stop oscillator timer
		    if (instrument.stopOscillatorTimeout) {
		        clearTimeout(instrument.stopOscillatorTimeout);
		        delete instrument.stopOscillatorTimeout;
		    }

		    // If a note is playing right now, clear the stop timeout, and call the
		    // callback.
		    if (instrument.stopTimeout) {
		        clearTimeout(instrument.stopTimeout);
		        delete instrument.stopTimeout;
		        if (instrument.stopCallback) {
		            // We have a callback for the play we are interrupting. We do not
		            // allow this callback to start a new play, because that leads to
		            // chaos. We pass in 'cancelled' to indicate that this note did not
		            // finish, but still stopped.
		            instrument._play = instrument.play;
		            instrument.play = function () { };
		            instrument.stopCallback('cancelled');
		            instrument.play = instrument._play;
		        }
		    }

		    // Stop the note without fadeOut if the duration is too short to hear the
		    // note otherwise.
		    var immediate = duration < H.sonification.fadeOutDuration + 20;

		    // Stop the instrument after the duration of the note
		    instrument.stopCallback = options.onEnd;
		    var onStop = function () {
		        delete instrument.stopTimeout;
		        instrument.stop(immediate);
		    };
		    if (duration) {
		        instrument.stopTimeout = setTimeout(
		            onStop,
		            immediate ? duration :
		                duration - H.sonification.fadeOutDuration
		        );

		        // Play the note
		        setOrStartTimer(options.frequency, 'setFrequency', null, {
		            minFrequency: options.minFrequency,
		            maxFrequency: options.maxFrequency
		        });

		        // Set the volume and panning
		        setOrStartTimer(H.pick(options.volume, 1), 'setGain', 4); // Slight ramp
		        setOrStartTimer(H.pick(options.pan, 0), 'setPan');
		    } else {
		        // No note duration, so just stop immediately
		        onStop();
		    }
		};


		/**
		 * Mute an instrument that is playing. If the instrument is not currently
		 * playing, this function does nothing.
		 *
		 * @function Highcharts.Instrument#mute
		 */
		Instrument.prototype.mute = function () {
		    this.setGain(0.0001, H.sonification.fadeOutDuration * 0.8);
		};


		/**
		 * Stop the instrument playing.
		 *
		 * @function Highcharts.Instrument#stop
		 *
		 * @param {boolean} immediately
		 *        Whether to do the stop immediately or fade out.
		 *
		 * @param {Function} onStopped
		 *        Callback function to be called when the stop is completed.
		 *
		 * @param {*} callbackData
		 *        Data to send to the onEnd callback functions.
		 */
		Instrument.prototype.stop = function (immediately, onStopped, callbackData) {
		    var instr = this,
		        reset = function () {
		            // Remove timeout reference
		            if (instr.stopOscillatorTimeout) {
		                delete instr.stopOscillatorTimeout;
		            }
		            // The oscillator may have stopped in the meantime here, so allow
		            // this function to fail if so.
		            try {
		                instr.oscillator.stop();
		            } catch (e) {}
		            instr.oscillator.disconnect(instr.gainNode);
		            // We need a new oscillator in order to restart it
		            instr.initOscillator(instr.options.oscillator);
		            // Done stopping, call the callback from the stop
		            if (onStopped) {
		                onStopped(callbackData);
		            }
		            // Call the callback for the play we finished
		            if (instr.stopCallback) {
		                instr.stopCallback(callbackData);
		            }
		        };
		    // Clear any existing timers
		    if (instr.playCallbackTimers.length) {
		        instr.clearPlayCallbackTimers();
		    }
		    if (instr.stopTimeout) {
		        clearTimeout(instr.stopTimeout);
		    }
		    if (immediately) {
		        instr.setGain(0);
		        reset();
		    } else {
		        instr.mute();
		        // Stop the oscillator after the mute fade-out has finished
		        instr.stopOscillatorTimeout =
		            setTimeout(reset, H.sonification.fadeOutDuration + 100);
		    }
		};



		return Instrument;
	}(Highcharts));
	var frequencies = (function () {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  List of musical frequencies from C0 to C8.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */


		var frequencies = [
		    16.351597831287414, // C0
		    17.323914436054505,
		    18.354047994837977,
		    19.445436482630058,
		    20.601722307054366,
		    21.826764464562746,
		    23.12465141947715,
		    24.499714748859326,
		    25.956543598746574,
		    27.5,               // A0
		    29.13523509488062,
		    30.86770632850775,
		    32.70319566257483,  // C1
		    34.64782887210901,
		    36.70809598967594,
		    38.890872965260115,
		    41.20344461410875,
		    43.653528929125486,
		    46.2493028389543,
		    48.999429497718666,
		    51.91308719749314,
		    55,                 // A1
		    58.27047018976124,
		    61.7354126570155,
		    65.40639132514966,  // C2
		    69.29565774421802,
		    73.41619197935188,
		    77.78174593052023,
		    82.4068892282175,
		    87.30705785825097,
		    92.4986056779086,
		    97.99885899543733,
		    103.82617439498628,
		    110,                // A2
		    116.54094037952248,
		    123.47082531403103,
		    130.8127826502993,  // C3
		    138.59131548843604,
		    146.8323839587038,
		    155.56349186104046,
		    164.81377845643496,
		    174.61411571650194,
		    184.9972113558172,
		    195.99771799087463,
		    207.65234878997256,
		    220,                // A3
		    233.08188075904496,
		    246.94165062806206,
		    261.6255653005986,  // C4
		    277.1826309768721,
		    293.6647679174076,
		    311.1269837220809,
		    329.6275569128699,
		    349.2282314330039,
		    369.9944227116344,
		    391.99543598174927,
		    415.3046975799451,
		    440,                // A4
		    466.1637615180899,
		    493.8833012561241,
		    523.2511306011972,  // C5
		    554.3652619537442,
		    587.3295358348151,
		    622.2539674441618,
		    659.2551138257398,
		    698.4564628660078,
		    739.9888454232688,
		    783.9908719634985,
		    830.6093951598903,
		    880,                // A5
		    932.3275230361799,
		    987.7666025122483,
		    1046.5022612023945, // C6
		    1108.7305239074883,
		    1174.6590716696303,
		    1244.5079348883237,
		    1318.5102276514797,
		    1396.9129257320155,
		    1479.9776908465376,
		    1567.981743926997,
		    1661.2187903197805,
		    1760,               // A6
		    1864.6550460723597,
		    1975.533205024496,
		    2093.004522404789,  // C7
		    2217.4610478149766,
		    2349.31814333926,
		    2489.0158697766474,
		    2637.02045530296,
		    2793.825851464031,
		    2959.955381693075,
		    3135.9634878539946,
		    3322.437580639561,
		    3520,               // A7
		    3729.3100921447194,
		    3951.066410048992,
		    4186.009044809578   // C8
		];


		return frequencies;
	}());
	var utilities = (function (musicalFrequencies) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Utility functions for sonification.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */




		/**
		 * The SignalHandler class. Stores signal callbacks (event handlers), and
		 * provides an interface to register them, and emit signals. The word "event" is
		 * not used to avoid confusion with TimelineEvents.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @class
		 * @name Highcharts.SignalHandler
		 *
		 * @param {Array<string>} supportedSignals
		 *        List of supported signal names.
		 */
		function SignalHandler(supportedSignals) {
		    this.init(supportedSignals || []);
		}
		SignalHandler.prototype.init = function (supportedSignals) {
		    this.supportedSignals = supportedSignals;
		    this.signals = {};
		};


		/**
		 * Register a set of signal callbacks with this SignalHandler.
		 * Multiple signal callbacks can be registered for the same signal.
		 * @private
		 * @param {object} signals - An object that contains a mapping from the signal
		 * name to the callbacks. Only supported events are considered.
		 */
		SignalHandler.prototype.registerSignalCallbacks = function (signals) {
		    var signalHandler = this;
		    signalHandler.supportedSignals.forEach(function (supportedSignal) {
		        if (signals[supportedSignal]) {
		            (
		                signalHandler.signals[supportedSignal] =
		                signalHandler.signals[supportedSignal] || []
		            ).push(
		                signals[supportedSignal]
		            );
		        }
		    });
		};


		/**
		 * Clear signal callbacks, optionally by name.
		 * @private
		 * @param {Array<string>} [signalNames] - A list of signal names to clear. If
		 * not supplied, all signal callbacks are removed.
		 */
		SignalHandler.prototype.clearSignalCallbacks = function (signalNames) {
		    var signalHandler = this;
		    if (signalNames) {
		        signalNames.forEach(function (signalName) {
		            if (signalHandler.signals[signalName]) {
		                delete signalHandler.signals[signalName];
		            }
		        });
		    } else {
		        signalHandler.signals = {};
		    }
		};


		/**
		 * Emit a signal. Does nothing if the signal does not exist, or has no
		 * registered callbacks.
		 * @private
		 * @param {string} signalNames - Name of signal to emit.
		 * @param {*} data - Data to pass to the callback.
		 */
		SignalHandler.prototype.emitSignal = function (signalName, data) {
		    var retval;
		    if (this.signals[signalName]) {
		        this.signals[signalName].forEach(function (handler) {
		            var result = handler(data);
		            retval = result !== undefined ? result : retval;
		        });
		    }
		    return retval;
		};


		var utilities = {

		    // List of musical frequencies from C0 to C8
		    musicalFrequencies: musicalFrequencies,

		    // SignalHandler class
		    SignalHandler: SignalHandler,

		    /**
		     * Get a musical scale by specifying the semitones from 1-12 to include.
		     *  1: C, 2: C#, 3: D, 4: D#, 5: E, 6: F,
		     *  7: F#, 8: G, 9: G#, 10: A, 11: Bb, 12: B
		     * @private
		     * @param {Array<number>} semitones - Array of semitones from 1-12 to
		     * include in the scale. Duplicate entries are ignored.
		     * @return {Array<number>} Array of frequencies from C0 to C8 that are
		     * included in this scale.
		     */
		    getMusicalScale: function (semitones) {
		        return musicalFrequencies.filter(function (freq, i) {
		            var interval = i % 12 + 1;
		            return semitones.some(function (allowedInterval) {
		                return allowedInterval === interval;
		            });
		        });
		    },

		    /**
		     * Calculate the extreme values in a chart for a data prop.
		     * @private
		     * @param {Highcharts.Chart} chart - The chart
		     * @param {string} prop - The data prop to find extremes for
		     * @return {object} Object with min and max properties
		     */
		    calculateDataExtremes: function (chart, prop) {
		        return chart.series.reduce(function (extremes, series) {
		            // We use cropped points rather than series.data here, to allow
		            // users to zoom in for better fidelity.
		            series.points.forEach(function (point) {
		                var val = point[prop] !== undefined ?
		                        point[prop] : point.options[prop];
		                extremes.min = Math.min(extremes.min, val);
		                extremes.max = Math.max(extremes.max, val);
		            });
		            return extremes;
		        }, {
		            min: Infinity,
		            max: -Infinity
		        });
		    },

		    /**
		     * Translate a value on a virtual axis. Creates a new, virtual, axis with a
		     * min and max, and maps the relative value onto this axis.
		     * @private
		     * @param {number} value - The relative data value to translate.
		     * @param {object} dataExtremes - The possible extremes for this value.
		     * @param {object} limits - Limits for the virtual axis.
		     * @return {number} The value mapped to the virtual axis.
		     */
		    virtualAxisTranslate: function (value, dataExtremes, limits) {
		        var lenValueAxis = dataExtremes.max - dataExtremes.min,
		            lenVirtualAxis = limits.max - limits.min,
		            virtualAxisValue = limits.min +
		                lenVirtualAxis * (value - dataExtremes.min) / lenValueAxis;

		        return lenValueAxis > 0 ?
		            Math.max(Math.min(virtualAxisValue, limits.max), limits.min) :
		            limits.min;
		    }
		};


		return utilities;
	}(frequencies));
	var instruments = (function (Instrument, utilities) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Instrument definitions for sonification module.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */



		var instruments = {};
		['sine', 'square', 'triangle', 'sawtooth'].forEach(function (waveform) {
		    // Add basic instruments
		    instruments[waveform] = new Instrument({
		        oscillator: { waveformShape: waveform }
		    });

		    // Add musical instruments
		    instruments[waveform + 'Musical'] = new Instrument({
		        allowedFrequencies: utilities.musicalFrequencies,
		        oscillator: { waveformShape: waveform }
		    });

		    // Add scaled instruments
		    instruments[waveform + 'Major'] = new Instrument({
		        allowedFrequencies: utilities.getMusicalScale([1, 3, 5, 6, 8, 10, 12]),
		        oscillator: { waveformShape: waveform }
		    });
		});


		return instruments;
	}(Instrument, utilities));
	var Earcon = (function (H) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Earcons for the sonification module in Highcharts.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */



		/**
		 * Define an Instrument and the options for playing it.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.EarconInstrument
		 *//**
		 * An instrument instance or the name of the instrument in the
		 * Highcharts.sonification.instruments map.
		 * @name Highcharts.EarconInstrument#instrument
		 * @type {Highcharts.Instrument|String}
		 *//**
		 * The options to pass to Instrument.play.
		 * @name Highcharts.EarconInstrument#playOptions
		 * @type {object}
		 */


		/**
		 * Options for an Earcon.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.EarconOptionsObject
		 *//**
		 * The instruments and their options defining this earcon.
		 * @name Highcharts.EarconOptionsObject#instruments
		 * @type {Array<Highcharts.EarconInstrument>}
		 *//**
		 * The unique ID of the Earcon. Generated if not supplied.
		 * @name Highcharts.EarconOptionsObject#id
		 * @type {string|undefined}
		 *//**
		 * Global panning of all instruments. Overrides all panning on individual
		 * instruments. Can be a number between -1 and 1.
		 * @name Highcharts.EarconOptionsObject#pan
		 * @type {number|undefined}
		 *//**
		 * Master volume for all instruments. Volume settings on individual instruments
		 * can still be used for relative volume between the instruments. This setting
		 * does not affect volumes set by functions in individual instruments. Can be a
		 * number between 0 and 1. Defaults to 1.
		 * @name Highcharts.EarconOptionsObject#volume
		 * @type {number|undefined}
		 *//**
		 * Callback function to call when earcon has finished playing.
		 * @name Highcharts.EarconOptionsObject#onEnd
		 * @type {Function|undefined}
		 */

		/**
		 * The Earcon class. Earcon objects represent a certain sound consisting of
		 * one or more instruments playing a predefined sound.
		 *
		 * @sample highcharts/sonification/earcon/
		 *         Using earcons directly
		 *
		 * @requires module:modules/sonification
		 *
		 * @class
		 * @name Highcharts.Earcon
		 *
		 * @param {Highcharts.EarconOptionsObject} options
		 *        Options for the Earcon instance.
		 */
		function Earcon(options) {
		    this.init(options || {});
		}
		Earcon.prototype.init = function (options) {
		    this.options = options;
		    if (!this.options.id) {
		        this.options.id = this.id = H.uniqueKey();
		    }
		    this.instrumentsPlaying = {};
		};


		/**
		 * Play the earcon, optionally overriding init options.
		 *
		 * @sample highcharts/sonification/earcon/
		 *         Using earcons directly
		 *
		 * @function Highcharts.Earcon#sonify
		 *
		 * @param {Highcharts.EarconOptionsObject} options
		 *        Override existing options.
		 */
		Earcon.prototype.sonify = function (options) {
		    var playOptions = H.merge(this.options, options);

		    // Find master volume/pan settings
		    var masterVolume = H.pick(playOptions.volume, 1),
		        masterPan = playOptions.pan,
		        earcon = this,
		        playOnEnd = options && options.onEnd,
		        masterOnEnd = earcon.options.onEnd;

		    // Go through the instruments and play them
		    playOptions.instruments.forEach(function (opts) {
		        var instrument = typeof opts.instrument === 'string' ?
		                H.sonification.instruments[opts.instrument] : opts.instrument,
		            instrumentOpts = H.merge(opts.playOptions),
		            instrOnEnd,
		            instrumentCopy,
		            copyId;
		        if (instrument && instrument.play) {
		            if (opts.playOptions) {
		                // Handle master pan/volume
		                if (typeof opts.playOptions.volume !== 'function') {
		                    instrumentOpts.volume = H.pick(masterVolume, 1) *
		                        H.pick(opts.playOptions.volume, 1);
		                }
		                instrumentOpts.pan = H.pick(masterPan, instrumentOpts.pan);

		                // Handle onEnd
		                instrOnEnd = instrumentOpts.onEnd;
		                instrumentOpts.onEnd = function () {
		                    delete earcon.instrumentsPlaying[copyId];
		                    if (instrOnEnd) {
		                        instrOnEnd.apply(this, arguments);
		                    }
		                    if (!Object.keys(earcon.instrumentsPlaying).length) {
		                        if (playOnEnd) {
		                            playOnEnd.apply(this, arguments);
		                        }
		                        if (masterOnEnd) {
		                            masterOnEnd.apply(this, arguments);
		                        }
		                    }
		                };

		                // Play the instrument. Use a copy so we can play multiple at
		                // the same time.
		                instrumentCopy = instrument.copy();
		                copyId = instrumentCopy.id;
		                earcon.instrumentsPlaying[copyId] = instrumentCopy;
		                instrumentCopy.play(instrumentOpts);
		            }
		        } else {
		            H.error(30);
		        }
		    });
		};


		/**
		 * Cancel any current sonification of the Earcon. Calls onEnd functions.
		 *
		 * @function Highcharts.Earcon#cancelSonify
		 *
		 * @param {boolean} [fadeOut=false]
		 *        Whether or not to fade out as we stop. If false, the earcon is
		 *        cancelled synchronously.
		 */
		Earcon.prototype.cancelSonify = function (fadeOut) {
		    var playing = this.instrumentsPlaying,
		        instrIds = playing && Object.keys(playing);
		    if (instrIds && instrIds.length) {
		        instrIds.forEach(function (instr) {
		            playing[instr].stop(!fadeOut, null, 'cancelled');
		        });
		        this.instrumentsPlaying = {};
		    }
		};



		return Earcon;
	}(Highcharts));
	var pointSonifyFunctions = (function (H, utilities) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Code for sonifying single points.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */


		/**
		 * Define the parameter mapping for an instrument.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.PointInstrumentMappingObject
		 *//**
		 * Define the volume of the instrument. This can be a string with a data
		 * property name, e.g. `'y'`, in which case this data property is used to define
		 * the volume relative to the `y`-values of the other points. A higher `y` value
		 * would then result in a higher volume. This option can also be a fixed number
		 * or a function. If it is a function, this function is called in regular
		 * intervals while the note is playing. It receives three arguments: The point,
		 * the dataExtremes, and the current relative time - where 0 is the beginning of
		 * the note and 1 is the end. The function should return the volume of the note
		 * as a number between 0 and 1.
		 * @name Highcharts.PointInstrumentMappingObject#volume
		 * @type {string|number|Function}
		 *//**
		 * Define the duration of the notes for this instrument. This can be a string
		 * with a data property name, e.g. `'y'`, in which case this data property is
		 * used to define the duration relative to the `y`-values of the other points. A
		 * higher `y` value would then result in a longer duration. This option can also
		 * be a fixed number or a function. If it is a function, this function is called
		 * once before the note starts playing, and should return the duration in
		 * milliseconds. It receives two arguments: The point, and the dataExtremes.
		 * @name Highcharts.PointInstrumentMappingObject#duration
		 * @type {string|number|Function}
		 *//**
		 * Define the panning of the instrument. This can be a string with a data
		 * property name, e.g. `'x'`, in which case this data property is used to define
		 * the panning relative to the `x`-values of the other points. A higher `x`
		 * value would then result in a higher panning value (panned further to the
		 * right). This option can also be a fixed number or a function. If it is a
		 * function, this function is called in regular intervals while the note is
		 * playing. It receives three arguments: The point, the dataExtremes, and the
		 * current relative time - where 0 is the beginning of the note and 1 is the
		 * end. The function should return the panning of the note as a number between
		 * -1 and 1.
		 * @name Highcharts.PointInstrumentMappingObject#pan
		 * @type {string|number|Function|undefined}
		 *//**
		 * Define the frequency of the instrument. This can be a string with a data
		 * property name, e.g. `'y'`, in which case this data property is used to define
		 * the frequency relative to the `y`-values of the other points. A higher `y`
		 * value would then result in a higher frequency. This option can also be a
		 * fixed number or a function. If it is a function, this function is called in
		 * regular intervals while the note is playing. It receives three arguments:
		 * The point, the dataExtremes, and the current relative time - where 0 is the
		 * beginning of the note and 1 is the end. The function should return the
		 * frequency of the note as a number (in Hz).
		 * @name Highcharts.PointInstrumentMappingObject#frequency
		 * @type {string|number|Function}
		 */


		/**
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.PointInstrumentOptionsObject
		 *//**
		 * The minimum duration for a note when using a data property for duration. Can
		 * be overridden by using either a fixed number or a function for
		 * instrumentMapping.duration. Defaults to 20.
		 * @name Highcharts.PointInstrumentOptionsObject#minDuration
		 * @type {number|undefined}
		 *//**
		 * The maximum duration for a note when using a data property for duration. Can
		 * be overridden by using either a fixed number or a function for
		 * instrumentMapping.duration. Defaults to 2000.
		 * @name Highcharts.PointInstrumentOptionsObject#maxDuration
		 * @type {number|undefined}
		 *//**
		 * The minimum pan value for a note when using a data property for panning. Can
		 * be overridden by using either a fixed number or a function for
		 * instrumentMapping.pan. Defaults to -1 (fully left).
		 * @name Highcharts.PointInstrumentOptionsObject#minPan
		 * @type {number|undefined}
		 *//**
		 * The maximum pan value for a note when using a data property for panning. Can
		 * be overridden by using either a fixed number or a function for
		 * instrumentMapping.pan. Defaults to 1 (fully right).
		 * @name Highcharts.PointInstrumentOptionsObject#maxPan
		 * @type {number|undefined}
		 *//**
		 * The minimum volume for a note when using a data property for volume. Can be
		 * overridden by using either a fixed number or a function for
		 * instrumentMapping.volume. Defaults to 0.1.
		 * @name Highcharts.PointInstrumentOptionsObject#minVolume
		 * @type {number|undefined}
		 *//**
		 * The maximum volume for a note when using a data property for volume. Can be
		 * overridden by using either a fixed number or a function for
		 * instrumentMapping.volume. Defaults to 1.
		 * @name Highcharts.PointInstrumentOptionsObject#maxVolume
		 * @type {number|undefined}
		 *//**
		 * The minimum frequency for a note when using a data property for frequency.
		 * Can be overridden by using either a fixed number or a function for
		 * instrumentMapping.frequency. Defaults to 220.
		 * @name Highcharts.PointInstrumentOptionsObject#minFrequency
		 * @type {number|undefined}
		 *//**
		 * The maximum frequency for a note when using a data property for frequency.
		 * Can be overridden by using either a fixed number or a function for
		 * instrumentMapping.frequency. Defaults to 2200.
		 * @name Highcharts.PointInstrumentOptionsObject#maxFrequency
		 * @type {number|undefined}
		 */


		/**
		 * An instrument definition for a point, specifying the instrument to play and
		 * how to play it.
		 *
		 * @interface Highcharts.PointInstrumentObject
		 *//**
		 * An Instrument instance or the name of the instrument in the
		 * Highcharts.sonification.instruments map.
		 * @name Highcharts.PointInstrumentObject#instrument
		 * @type {Highcharts.Instrument|string}
		 *//**
		 * Mapping of instrument parameters for this instrument.
		 * @name Highcharts.PointInstrumentObject#instrumentMapping
		 * @type {Highcharts.PointInstrumentMappingObject}
		 *//**
		 * Options for this instrument.
		 * @name Highcharts.PointInstrumentObject#instrumentOptions
		 * @type {Highcharts.PointInstrumentOptionsObject|undefined}
		 *//**
		 * Callback to call when the instrument has stopped playing.
		 * @name Highcharts.PointInstrumentObject#onEnd
		 * @type {Function|undefined}
		 */


		/**
		 * Options for sonifying a point.
		 * @interface Highcharts.PointSonifyOptionsObject
		 *//**
		 * The instrument definitions for this point.
		 * @name Highcharts.PointSonifyOptionsObject#instruments
		 * @type {Array<Highcharts.PointInstrumentObject>}
		 *//**
		 * Optionally provide the minimum/maximum values for the points. If this is not
		 * supplied, it is calculated from the points in the chart on demand. This
		 * option is supplied in the following format, as a map of point data properties
		 * to objects with min/max values:
		 *  ```js
		 *      dataExtremes: {
		 *          y: {
		 *              min: 0,
		 *              max: 100
		 *          },
		 *          z: {
		 *              min: -10,
		 *              max: 10
		 *          }
		 *          // Properties used and not provided are calculated on demand
		 *      }
		 *  ```
		 * @name Highcharts.PointSonifyOptionsObject#dataExtremes
		 * @type {object|undefined}
		 *//**
		 * Callback called when the sonification has finished.
		 * @name Highcharts.PointSonifyOptionsObject#onEnd
		 * @type {Function|undefined}
		 */




		// Defaults for the instrument options
		// NOTE: Also change defaults in Highcharts.PointInstrumentOptionsObject if
		//       making changes here.
		var defaultInstrumentOptions = {
		    minDuration: 20,
		    maxDuration: 2000,
		    minVolume: 0.1,
		    maxVolume: 1,
		    minPan: -1,
		    maxPan: 1,
		    minFrequency: 220,
		    maxFrequency: 2200
		};


		/**
		 * Sonify a single point.
		 *
		 * @sample highcharts/sonification/point-basic/
		 *         Click on points to sonify
		 * @sample highcharts/sonification/point-advanced/
		 *         Sonify bubbles
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Point#sonify
		 *
		 * @param {Highcharts.PointSonifyOptionsObject} options
		 *        Options for the sonification of the point.
		 */
		function pointSonify(options) {
		    var point = this,
		        chart = point.series.chart,
		        dataExtremes = options.dataExtremes || {},
		        // Get the value to pass to instrument.play from the mapping value
		        // passed in.
		        getMappingValue = function (
		            value, makeFunction, allowedExtremes, allowedValues
		        ) {
		            // Fixed number, just use that
		            if (typeof value === 'number' || value === undefined) {
		                return value;
		            }
		            // Function. Return new function if we try to use callback,
		            // otherwise call it now and return result.
		            if (typeof value === 'function') {
		                return makeFunction ?
		                    function (time) {
		                        return value(point, dataExtremes, time);
		                    } :
		                    value(point, dataExtremes);
		            }
		            // String, this is a data prop.
		            if (typeof value === 'string') {
		                // Find data extremes if we don't have them
		                dataExtremes[value] = dataExtremes[value] ||
		                    utilities.calculateDataExtremes(
		                        point.series.chart, value
		                    );
		                // Find the value
		                return utilities.virtualAxisTranslate(
		                    H.pick(point[value], point.options[value]),
		                    dataExtremes[value],
		                    allowedExtremes,
		                    allowedValues
		                );
		            }
		        };

		    // Register playing point on chart
		    chart.sonification.currentlyPlayingPoint = point;

		    // Keep track of instruments playing
		    point.sonification = point.sonification || {};
		    point.sonification.instrumentsPlaying =
		        point.sonification.instrumentsPlaying || {};

		    // Register signal handler for the point
		    var signalHandler = point.sonification.signalHandler =
		        point.sonification.signalHandler ||
		        new utilities.SignalHandler(['onEnd']);
		    signalHandler.clearSignalCallbacks();
		    signalHandler.registerSignalCallbacks({ onEnd: options.onEnd });

		    // If we have a null point or invisible point, just return
		    if (point.isNull || !point.visible || !point.series.visible) {
		        signalHandler.emitSignal('onEnd');
		        return;
		    }

		    // Go through instruments and play them
		    options.instruments.forEach(function (instrumentDefinition) {
		        var instrument = typeof instrumentDefinition.instrument === 'string' ?
		                H.sonification.instruments[instrumentDefinition.instrument] :
		                instrumentDefinition.instrument,
		            mapping = instrumentDefinition.instrumentMapping || {},
		            extremes = H.merge(
		                defaultInstrumentOptions,
		                instrumentDefinition.instrumentOptions
		            ),
		            id = instrument.id,
		            onEnd = function (cancelled) {
		                // Instrument on end
		                if (instrumentDefinition.onEnd) {
		                    instrumentDefinition.onEnd.apply(this, arguments);
		                }

		                // Remove currently playing point reference on chart
		                if (
		                    chart.sonification &&
		                    chart.sonification.currentlyPlayingPoint
		                ) {
		                    delete chart.sonification.currentlyPlayingPoint;
		                }

		                // Remove reference from instruments playing
		                if (
		                    point.sonification && point.sonification.instrumentsPlaying
		                ) {
		                    delete point.sonification.instrumentsPlaying[id];

		                    // This was the last instrument?
		                    if (
		                        !Object.keys(
		                            point.sonification.instrumentsPlaying
		                        ).length
		                    ) {
		                        signalHandler.emitSignal('onEnd', cancelled);
		                    }
		                }
		            };

		        // Play the note on the instrument
		        if (instrument && instrument.play) {
		            point.sonification.instrumentsPlaying[instrument.id] = instrument;
		            instrument.play({
		                frequency: getMappingValue(
		                    mapping.frequency,
		                    true,
		                    { min: extremes.minFrequency, max: extremes.maxFrequency }
		                ),
		                duration: getMappingValue(
		                    mapping.duration,
		                    false,
		                    { min: extremes.minDuration, max: extremes.maxDuration }
		                ),
		                pan: getMappingValue(
		                    mapping.pan,
		                    true,
		                    { min: extremes.minPan, max: extremes.maxPan }
		                ),
		                volume: getMappingValue(
		                    mapping.volume,
		                    true,
		                    { min: extremes.minVolume, max: extremes.maxVolume }
		                ),
		                onEnd: onEnd,
		                minFrequency: extremes.minFrequency,
		                maxFrequency: extremes.maxFrequency
		            });
		        } else {
		            H.error(30);
		        }
		    });
		}


		/**
		 * Cancel sonification of a point. Calls onEnd functions.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Point#cancelSonify
		 *
		 * @param {boolean} [fadeOut=false]
		 *        Whether or not to fade out as we stop. If false, the points are
		 *        cancelled synchronously.
		 */
		function pointCancelSonify(fadeOut) {
		    var playing = this.sonification && this.sonification.instrumentsPlaying,
		        instrIds = playing && Object.keys(playing);
		    if (instrIds && instrIds.length) {
		        instrIds.forEach(function (instr) {
		            playing[instr].stop(!fadeOut, null, 'cancelled');
		        });
		        this.sonification.instrumentsPlaying = {};
		        this.sonification.signalHandler.emitSignal('onEnd', 'cancelled');
		    }
		}


		var pointSonifyFunctions = {
		    pointSonify: pointSonify,
		    pointCancelSonify: pointCancelSonify
		};

		return pointSonifyFunctions;
	}(Highcharts, utilities));
	var chartSonifyFunctions = (function (H, utilities) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Sonification functions for chart/series.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */


		/**
		 * An Earcon configuration, specifying an Earcon and when to play it.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.EarconConfiguration
		 *//**
		 * An Earcon instance.
		 * @name Highcharts.EarconConfiguration#earcon
		 * @type {Highcharts.Earcon}
		 *//**
		 * The ID of the point to play the Earcon on.
		 * @name Highcharts.EarconConfiguration#onPoint
		 * @type {string|undefined}
		 *//**
		 * A function to determine whether or not to play this earcon on a point. The
		 * function is called for every point, receiving that point as parameter. It
		 * should return either a boolean indicating whether or not to play the earcon,
		 * or a new Earcon instance - in which case the new Earcon will be played.
		 * @name Highcharts.EarconConfiguration#condition
		 * @type {Function|undefined}
		 */

		/**
		 * Options for sonifying a series.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.SonifySeriesOptionsObject
		 *//**
		 * The duration for playing the points. Note that points might continue to play
		 * after the duration has passed, but no new points will start playing.
		 * @name Highcharts.SonifySeriesOptionsObject#duration
		 * @type {number}
		 *//**
		 * The axis to use for when to play the points. Can be a string with a data
		 * property (e.g. `x`), or a function. If it is a function, this function
		 * receives the point as argument, and should return a numeric value. The points
		 * with the lowest numeric values are then played first, and the time between
		 * points will be proportional to the distance between the numeric values.
		 * @name Highcharts.SonifySeriesOptionsObject#pointPlayTime
		 * @type {string|Function}
		 *//**
		 * The instrument definitions for the points in this series.
		 * @name Highcharts.SonifySeriesOptionsObject#instruments
		 * @type {Array<Highcharts.PointInstrumentObject>}
		 *//**
		 * Earcons to add to the series.
		 * @name Highcharts.SonifySeriesOptionsObject#earcons
		 * @type {Array<Highcharts.EarconConfiguration>|undefined}
		 *//**
		 * Optionally provide the minimum/maximum data values for the points. If this is
		 * not supplied, it is calculated from all points in the chart on demand. This
		 * option is supplied in the following format, as a map of point data properties
		 * to objects with min/max values:
		 * ```js
		 *     dataExtremes: {
		 *         y: {
		 *             min: 0,
		 *             max: 100
		 *         },
		 *         z: {
		 *             min: -10,
		 *             max: 10
		 *         }
		 *         // Properties used and not provided are calculated on demand
		 *     }
		 * ```
		 * @name Highcharts.SonifySeriesOptionsObject#dataExtremes
		 * @type {object|undefined}
		 *//**
		 * Callback before a point is played.
		 * @name Highcharts.SonifySeriesOptionsObject#onPointStart
		 * @type {Function|undefined}
		 *//**
		 * Callback after a point has finished playing.
		 * @name Highcharts.SonifySeriesOptionsObject#onPointEnd
		 * @type {Function|undefined}
		 *//**
		 * Callback after the series has played.
		 * @name Highcharts.SonifySeriesOptionsObject#onEnd
		 * @type {Function|undefined}
		 */




		/**
		 * Get the relative time value of a point.
		 * @private
		 * @param {Highcharts.Point} point - The point.
		 * @param {Function|string} timeProp - The time axis data prop or the time
		 * function.
		 * @return {number} The time value.
		 */
		function getPointTimeValue(point, timeProp) {
		    return typeof timeProp === 'function' ?
		        timeProp(point) :
		        H.pick(point[timeProp], point.options[timeProp]);
		}


		/**
		 * Get the time extremes of this series. This is handled outside of the
		 * dataExtremes, as we always want to just sonify the visible points, and we
		 * always want the extremes to be the extremes of the visible points.
		 * @private
		 * @param {Highcharts.Series} series - The series to compute on.
		 * @param {Function|string} timeProp - The time axis data prop or the time
		 * function.
		 * @return {object} Object with min/max extremes for the time values.
		 */
		function getTimeExtremes(series, timeProp) {
		    // Compute the extremes from the visible points.
		    return series.points.reduce(function (acc, point) {
		        var value = getPointTimeValue(point, timeProp);
		        acc.min = Math.min(acc.min, value);
		        acc.max = Math.max(acc.max, value);
		        return acc;
		    }, {
		        min: Infinity,
		        max: -Infinity
		    });
		}


		/**
		 * Calculate value extremes for used instrument data properties.
		 * @private
		 * @param {Highcharts.Chart} chart - The chart to calculate extremes from.
		 * @param {Array<Highcharts.PointInstrumentObject>} instruments - The instrument
		 * definitions used.
		 * @param {object} [dataExtremes] - Predefined extremes for each data prop.
		 * @return {object} New extremes with data properties mapped to min/max objects.
		 */
		function getExtremesForInstrumentProps(chart, instruments, dataExtremes) {
		    return (
		        instruments || []
		    ).reduce(function (newExtremes, instrumentDefinition) {
		        Object.keys(instrumentDefinition.instrumentMapping || {}).forEach(
		            function (instrumentParameter) {
		                var value = instrumentDefinition.instrumentMapping[
		                    instrumentParameter
		                ];
		                if (typeof value === 'string' && !newExtremes[value]) {
		                    // This instrument parameter is mapped to a data prop.
		                    // If we don't have predefined data extremes, find them.
		                    newExtremes[value] = utilities.calculateDataExtremes(
		                        chart, value
		                    );
		                }
		            }
		        );
		        return newExtremes;
		    }, H.merge(dataExtremes));
		}


		/**
		 * Get earcons for the point if there are any.
		 * @private
		 * @param {Highcharts.Point} point - The point to find earcons for.
		 * @param {Array<Highcharts.EarconConfiguration>} earconDefinitions - Earcons to
		 * check.
		 * @return {Array<Highcharts.Earcon>} Array of earcons to be played with this
		 * point.
		 */
		function getPointEarcons(point, earconDefinitions) {
		    return earconDefinitions.reduce(
		        function (earcons, earconDefinition) {
		            var cond,
		                earcon = earconDefinition.earcon;
		            if (earconDefinition.condition) {
		                // We have a condition. This overrides onPoint
		                cond = earconDefinition.condition(point);
		                if (cond instanceof H.sonification.Earcon) {
		                    // Condition returned an earcon
		                    earcons.push(cond);
		                } else if (cond) {
		                    // Condition returned true
		                    earcons.push(earcon);
		                }
		            } else if (
		                earconDefinition.onPoint &&
		                point.id === earconDefinition.onPoint
		            ) {
		                // We have earcon onPoint
		                earcons.push(earcon);
		            }
		            return earcons;
		        }, []
		    );
		}


		/**
		 * Utility function to get a new list of instrument options where all the
		 * instrument references are copies.
		 * @private
		 * @param {Array<Highcharts.PointInstrumentObject>} instruments - The instrument
		 * options.
		 * @return {Array<Highcharts.PointInstrumentObject>} Array of copied instrument
		 * options.
		 */
		function makeInstrumentCopies(instruments) {
		    return instruments.map(function (instrumentDef) {
		        var instrument = instrumentDef.instrument,
		            copy = (typeof instrument === 'string' ?
		                H.sonification.instruments[instrument] :
		                instrument).copy();
		        return H.merge(instrumentDef, { instrument: copy });
		    });
		}


		/**
		 * Create a TimelinePath from a series. Takes the same options as seriesSonify.
		 * To intuitively allow multiple series to play simultaneously we make copies of
		 * the instruments for each series.
		 * @private
		 * @param {Highcharts.Series} series - The series to build from.
		 * @param {object} options - The options for building the TimelinePath.
		 * @return {Highcharts.TimelinePath} A timeline path with events.
		 */
		function buildTimelinePathFromSeries(series, options) {
		    // options.timeExtremes is internal and used so that the calculations from
		    // chart.sonify can be reused.
		    var timeExtremes = options.timeExtremes || getTimeExtremes(
		            series, options.pointPlayTime, options.dataExtremes
		        ),
		        // Get time offset for a point, relative to duration
		        pointToTime = function (point) {
		            return utilities.virtualAxisTranslate(
		                getPointTimeValue(point, options.pointPlayTime),
		                timeExtremes,
		                { min: 0, max: options.duration }
		            );
		        },
		        // Compute any data extremes that aren't defined yet
		        dataExtremes = getExtremesForInstrumentProps(
		            series.chart, options.instruments, options.dataExtremes
		        ),
		        // Make copies of the instruments used for this series, to allow
		        // multiple series with the same instrument to play together
		        instruments = makeInstrumentCopies(options.instruments),
		        // Go through the points, convert to events, optionally add Earcons
		        timelineEvents = series.points.reduce(function (events, point) {
		            var earcons = getPointEarcons(point, options.earcons || []),
		                time = pointToTime(point);
		            return events.concat(
		                // Event object for point
		                new H.sonification.TimelineEvent({
		                    eventObject: point,
		                    time: time,
		                    id: point.id,
		                    playOptions: {
		                        instruments: instruments,
		                        dataExtremes: dataExtremes
		                    }
		                }),
		                // Earcons
		                earcons.map(function (earcon) {
		                    return new H.sonification.TimelineEvent({
		                        eventObject: earcon,
		                        time: time
		                    });
		                })
		            );
		        }, []);

		    // Build the timeline path
		    return new H.sonification.TimelinePath({
		        events: timelineEvents,
		        onStart: function () {
		            if (options.onStart) {
		                options.onStart(series);
		            }
		        },
		        onEventStart: function (event) {
		            var eventObject = event.options && event.options.eventObject;
		            if (eventObject instanceof H.Point) {
		                // Check for hidden series
		                if (
		                    !eventObject.series.visible &&
		                    !eventObject.series.chart.series.some(function (series) {
		                        return series.visible;
		                    })
		                ) {
		                    // We have no visible series, stop the path.
		                    event.timelinePath.timeline.pause();
		                    event.timelinePath.timeline.resetCursor();
		                    return false;
		                }
		                // Emit onPointStart
		                if (options.onPointStart) {
		                    options.onPointStart(event, eventObject);
		                }
		            }
		        },
		        onEventEnd: function (eventData) {
		            var eventObject = eventData.event && eventData.event.options &&
		                    eventData.event.options.eventObject;
		            if (eventObject instanceof H.Point && options.onPointEnd) {
		                options.onPointEnd(eventData.event, eventObject);
		            }
		        },
		        onEnd: function () {
		            if (options.onEnd) {
		                options.onEnd(series);
		            }
		        }
		    });
		}

		/**
		 * Sonify a series.
		 *
		 * @sample highcharts/sonification/series-basic/
		 *         Click on series to sonify
		 * @sample highcharts/sonification/series-earcon/
		 *         Series with earcon
		 * @sample highcharts/sonification/point-play-time/
		 *         Play y-axis by time
		 * @sample highcharts/sonification/earcon-on-point/
		 *         Earcon set on point
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Series#sonify
		 *
		 * @param {Highcharts.SonifySeriesOptionsObject} options
		 *        The options for sonifying this series.
		 */
		function seriesSonify(options) {
		    var timelinePath = buildTimelinePathFromSeries(this, options),
		        chartSonification = this.chart.sonification;

		    // Only one timeline can play at a time. If we want multiple series playing
		    // at the same time, use chart.sonify.
		    if (chartSonification.timeline) {
		        chartSonification.timeline.pause();
		    }

		    // Create new timeline for this series, and play it.
		    chartSonification.timeline = new H.sonification.Timeline({
		        paths: [timelinePath]
		    });

		    chartSonification.timeline.play();
		}


		/**
		 * Utility function to assemble options for creating a TimelinePath from a
		 * series when sonifying an entire chart.
		 * @private
		 * @param {Highcharts.Series} series - The series to return options for.
		 * @param {object} dataExtremes - Pre-calculated data extremes for the chart.
		 * @param {object} chartSonifyOptions - Options passed in to chart.sonify.
		 * @return {object} Options for buildTimelinePathFromSeries.
		 */
		function buildSeriesOptions(series, dataExtremes, chartSonifyOptions) {
		    var seriesOptions = chartSonifyOptions.seriesOptions || {};
		    return H.merge(
		        {
		            // Calculated dataExtremes for chart
		            dataExtremes: dataExtremes,
		            // We need to get timeExtremes for each series. We pass this
		            // in when building the TimelinePath objects to avoid
		            // calculating twice.
		            timeExtremes: getTimeExtremes(
		                series, chartSonifyOptions.pointPlayTime
		            ),
		            // Some options we just pass on
		            instruments: chartSonifyOptions.instruments,
		            onStart: chartSonifyOptions.onSeriesStart,
		            onEnd: chartSonifyOptions.onSeriesEnd,
		            earcons: chartSonifyOptions.earcons
		        },
		        // Merge in the specific series options by ID
		        H.isArray(seriesOptions) ? (
		            H.find(seriesOptions, function (optEntry) {
		                return optEntry.id === H.pick(series.id, series.options.id);
		            }) || {}
		        ) : seriesOptions,
		        {
		            // Forced options
		            pointPlayTime: chartSonifyOptions.pointPlayTime
		        }
		    );
		}


		/**
		 * Utility function to normalize the ordering of timeline paths when sonifying
		 * a chart.
		 * @private
		 * @param {string|Array<string|Highcharts.Earcon|Array<string|Highcharts.Earcon>>} orderOptions -
		 * Order options for the sonification.
		 * @param {Highcharts.Chart} chart - The chart we are sonifying.
		 * @param {Function} seriesOptionsCallback - A function that takes a series as
		 * argument, and returns the series options for that series to be used with
		 * buildTimelinePathFromSeries.
		 * @return {Array<object|Array<object|Highcharts.TimelinePath>>} If order is
		 * sequential, we return an array of objects to create series paths from. If
		 * order is simultaneous we return an array of an array with the same. If there
		 * is a custom order, we return an array of arrays of either objects (for
		 * series) or TimelinePaths (for earcons and delays).
		 */
		function buildPathOrder(orderOptions, chart, seriesOptionsCallback) {
		    var order;
		    if (orderOptions === 'sequential' || orderOptions === 'simultaneous') {
		        // Just add the series from the chart
		        order = chart.series.reduce(function (seriesList, series) {
		            if (series.visible) {
		                seriesList.push({
		                    series: series,
		                    seriesOptions: seriesOptionsCallback(series)
		                });
		            }
		            return seriesList;
		        }, []);

		        // If order is simultaneous, group all series together
		        if (orderOptions === 'simultaneous') {
		            order = [order];
		        }
		    } else {
		        // We have a specific order, and potentially custom items - like
		        // earcons or silent waits.
		        order = orderOptions.reduce(function (orderList, orderDef) {
		            // Return set of items to play simultaneously. Could be only one.
		            var simulItems = H.splat(orderDef).reduce(function (items, item) {
		                var itemObject;

		                // Is this item a series ID?
		                if (typeof item === 'string') {
		                    var series = chart.get(item);
		                    if (series.visible) {
		                        itemObject = {
		                            series: series,
		                            seriesOptions: seriesOptionsCallback(series)
		                        };
		                    }

		                // Is it an earcon? If so, just create the path.
		                } else if (item instanceof H.sonification.Earcon) {
		                    // Path with a single event
		                    itemObject = new H.sonification.TimelinePath({
		                        events: [new H.sonification.TimelineEvent({
		                            eventObject: item
		                        })]
		                    });

		                // Is this item a silent wait? If so, just create the path.
		                } if (item.silentWait) {
		                    itemObject = new H.sonification.TimelinePath({
		                        silentWait: item.silentWait
		                    });
		                }

		                // Add to items to play simultaneously
		                if (itemObject) {
		                    items.push(itemObject);
		                }
		                return items;
		            }, []);

		            // Add to order list
		            if (simulItems.length) {
		                orderList.push(simulItems);
		            }
		            return orderList;
		        }, []);
		    }
		    return order;
		}


		/**
		 * Utility function to add a silent wait after all series.
		 * @private
		 * @param {Array<object|Array<object|TimelinePath>>} order - The order of items.
		 * @param {number} wait - The wait in milliseconds to add.
		 * @return {Array<object|Array<object|TimelinePath>>} The order with waits inserted.
		 */
		function addAfterSeriesWaits(order, wait) {
		    if (!wait) {
		        return order;
		    }

		    return order.reduce(function (newOrder, orderDef, i) {
		        var simultaneousPaths = H.splat(orderDef);
		        newOrder.push(simultaneousPaths);

		        // Go through the simultaneous paths and see if there is a series there
		        if (
		            i < order.length - 1 && // Do not add wait after last series
		            simultaneousPaths.some(function (item) {
		                return item.series;
		            })
		        ) {
		            // We have a series, meaning we should add a wait after these
		            // paths have finished.
		            newOrder.push(new H.sonification.TimelinePath({
		                silentWait: wait
		            }));
		        }

		        return newOrder;
		    }, []);
		}


		/**
		 * Utility function to find the total amout of wait time in the TimelinePaths.
		 * @private
		 * @param {Array<object|Array<object|TimelinePath>>} order - The order of
		 * TimelinePaths/items.
		 * @return {number} The total time in ms spent on wait paths between playing.
		 */
		function getWaitTime(order) {
		    return order.reduce(function (waitTime, orderDef) {
		        var def = H.splat(orderDef);
		        return waitTime + (
		            def.length === 1 && def[0].options && def[0].options.silentWait || 0
		        );
		    }, 0);
		}


		/**
		 * Utility function to ensure simultaneous paths have start/end events at the
		 * same time, to sync them.
		 * @private
		 * @param {Array<Highcharts.TimelinePath>} paths - The paths to sync.
		 */
		function syncSimultaneousPaths(paths) {
		    // Find the extremes for these paths
		    var extremes = paths.reduce(function (extremes, path) {
		        var events = path.events;
		        if (events && events.length) {
		            extremes.min = Math.min(events[0].time, extremes.min);
		            extremes.max = Math.max(
		                events[events.length - 1].time, extremes.max
		            );
		        }
		        return extremes;
		    }, {
		        min: Infinity,
		        max: -Infinity
		    });

		    // Go through the paths and add events to make them fit the same timespan
		    paths.forEach(function (path) {
		        var events = path.events,
		            hasEvents = events && events.length,
		            eventsToAdd = [];
		        if (!(hasEvents && events[0].time <= extremes.min)) {
		            eventsToAdd.push(new H.sonification.TimelineEvent({
		                time: extremes.min
		            }));
		        }
		        if (!(hasEvents && events[events.length - 1].time >= extremes.max)) {
		            eventsToAdd.push(new H.sonification.TimelineEvent({
		                time: extremes.max
		            }));
		        }
		        if (eventsToAdd.length) {
		            path.addTimelineEvents(eventsToAdd);
		        }
		    });
		}


		/**
		 * Utility function to find the total duration span for all simul path sets
		 * that include series.
		 * @private
		 * @param {Array<object|Array<object|Highcharts.TimelinePath>>} order - The
		 * order of TimelinePaths/items.
		 * @return {number} The total time value span difference for all series.
		 */
		function getSimulPathDurationTotal(order) {
		    return order.reduce(function (durationTotal, orderDef) {
		        return durationTotal + H.splat(orderDef).reduce(
		            function (maxPathDuration, item) {
		                var timeExtremes = item.series && item.seriesOptions &&
		                        item.seriesOptions.timeExtremes;
		                return timeExtremes ?
		                    Math.max(
		                        maxPathDuration, timeExtremes.max - timeExtremes.min
		                    ) : maxPathDuration;
		            }, 0);
		    }, 0);
		}


		/**
		 * Function to calculate the duration in ms for a series.
		 * @private
		 * @param {number} seriesValueDuration - The duration of the series in value
		 * difference.
		 * @param {number} totalValueDuration - The total duration of all (non
		 * simultaneous) series in value difference.
		 * @param {number} totalDurationMs - The desired total duration for all series
		 * in milliseconds.
		 * @return {number} The duration for the series in milliseconds.
		 */
		function getSeriesDurationMs(
		    seriesValueDuration, totalValueDuration, totalDurationMs
		) {
		    // A series spanning the whole chart would get the full duration.
		    return utilities.virtualAxisTranslate(
		        seriesValueDuration,
		        { min: 0, max: totalValueDuration },
		        { min: 0, max: totalDurationMs }
		    );
		}


		/**
		 * Convert series building objects into paths and return a new list of
		 * TimelinePaths.
		 * @private
		 * @param {Array<object|Array<object|Highcharts.TimelinePath>>} order - The
		 * order list.
		 * @param {number} duration - Total duration to aim for in milliseconds.
		 * @return {Array<Array<Highcharts.TimelinePath>>} Array of TimelinePath objects
		 * to play.
		 */
		function buildPathsFromOrder(order, duration) {
		    // Find time used for waits (custom or after series), and subtract it from
		    // available duration.
		    var totalAvailableDurationMs = Math.max(
		            duration - getWaitTime(order), 0
		        ),
		        // Add up simultaneous path durations to find total value span duration
		        // of everything
		        totalUsedDuration = getSimulPathDurationTotal(order);

		    // Go through the order list and convert the items
		    return order.reduce(function (allPaths, orderDef) {
		        var simultaneousPaths = H.splat(orderDef).reduce(
		                function (simulPaths, item) {
		                    if (item instanceof H.sonification.TimelinePath) {
		                        // This item is already a path object
		                        simulPaths.push(item);
		                    } else if (item.series) {
		                        // We have a series.
		                        // We need to set the duration of the series
		                        item.seriesOptions.duration =
		                            item.seriesOptions.duration || getSeriesDurationMs(
		                                item.seriesOptions.timeExtremes.max -
		                                item.seriesOptions.timeExtremes.min,
		                                totalUsedDuration,
		                                totalAvailableDurationMs
		                            );

		                        // Add the path
		                        simulPaths.push(buildTimelinePathFromSeries(
		                            item.series,
		                            item.seriesOptions
		                        ));
		                    }
		                    return simulPaths;
		                }, []
		            );

		        // Add in the simultaneous paths
		        allPaths.push(simultaneousPaths);
		        return allPaths;
		    }, []);
		}


		/**
		 * Options for sonifying a chart.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.SonifyChartOptionsObject
		 *//**
		 * Duration for sonifying the entire chart. The duration is distributed across
		 * the different series intelligently, but does not take earcons into account.
		 * It is also possible to set the duration explicitly per series, using
		 * `seriesOptions`. Note that points may continue to play after the duration has
		 * passed, but no new points will start playing.
		 * @name Highcharts.SonifyChartOptionsObject#duration
		 * @type {number}
		 *//**
		 * Define the order to play the series in. This can be given as a string, or an
		 * array specifying a custom ordering. If given as a string, valid values are
		 * `sequential` - where each series is played in order - or `simultaneous`,
		 * where all series are played at once. For custom ordering, supply an array as
		 * the order. Each element in the array can be either a string with a series ID,
		 * an Earcon object, or an object with a numeric `silentWait` property
		 * designating a number of milliseconds to wait before continuing. Each element
		 * of the array will be played in order. To play elements simultaneously, group
		 * the elements in an array.
		 * @name Highcharts.SonifyChartOptionsObject#order
		 * @type {string|Array<string|Highcharts.Earcon|Array<string|Highcharts.Earcon>>}
		 *//**
		 * The axis to use for when to play the points. Can be a string with a data
		 * property (e.g. `x`), or a function. If it is a function, this function
		 * receives the point as argument, and should return a numeric value. The points
		 * with the lowest numeric values are then played first, and the time between
		 * points will be proportional to the distance between the numeric values. This
		 * option can not be overridden per series.
		 * @name Highcharts.SonifyChartOptionsObject#pointPlayTime
		 * @type {string|Function}
		 *//**
		 * Milliseconds of silent waiting to add between series. Note that waiting time
		 * is considered part of the sonify duration.
		 * @name Highcharts.SonifyChartOptionsObject#afterSeriesWait
		 * @type {number|undefined}
		 *//**
		 * Options as given to `series.sonify` to override options per series. If the
		 * option is supplied as an array of options objects, the `id` property of the
		 * object should correspond to the series' id. If the option is supplied as a
		 * single object, the options apply to all series.
		 * @name Highcharts.SonifyChartOptionsObject#seriesOptions
		 * @type {Object|Array<object>|undefined}
		 *//**
		 * The instrument definitions for the points in this chart.
		 * @name Highcharts.SonifyChartOptionsObject#instruments
		 * @type {Array<Highcharts.PointInstrumentObject>|undefined}
		 *//**
		 * Earcons to add to the chart. Note that earcons can also be added per series
		 * using `seriesOptions`.
		 * @name Highcharts.SonifyChartOptionsObject#earcons
		 * @type {Array<Highcharts.EarconConfiguration>|undefined}
		 *//**
		 * Optionally provide the minimum/maximum data values for the points. If this is
		 * not supplied, it is calculated from all points in the chart on demand. This
		 * option is supplied in the following format, as a map of point data properties
		 * to objects with min/max values:
		 *  ```js
		 *      dataExtremes: {
		 *          y: {
		 *              min: 0,
		 *              max: 100
		 *          },
		 *          z: {
		 *              min: -10,
		 *              max: 10
		 *          }
		 *          // Properties used and not provided are calculated on demand
		 *      }
		 *  ```
		 * @name Highcharts.SonifyChartOptionsObject#dataExtremes
		 * @type {object|undefined}
		 *//**
		 * Callback before a series is played.
		 * @name Highcharts.SonifyChartOptionsObject#onSeriesStart
		 * @type {Function|undefined}
		 *//**
		 * Callback after a series has finished playing.
		 * @name Highcharts.SonifyChartOptionsObject#onSeriesEnd
		 * @type {Function|undefined}
		 *//**
		 * Callback after the chart has played.
		 * @name Highcharts.SonifyChartOptionsObject#onEnd
		 * @type {Function|undefined}
		 */


		/**
		 * Sonify a chart.
		 *
		 * @sample highcharts/sonification/chart-sequential/
		 *         Sonify a basic chart
		 * @sample highcharts/sonification/chart-simultaneous/
		 *         Sonify series simultaneously
		 * @sample highcharts/sonification/chart-custom-order/
		 *         Custom defined order of series
		 * @sample highcharts/sonification/chart-earcon/
		 *         Earcons on chart
		 * @sample highcharts/sonification/chart-events/
		 *         Sonification events on chart
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#sonify
		 *
		 * @param {Highcharts.SonifyChartOptionsObject} options
		 *        The options for sonifying this chart.
		 */
		function chartSonify(options) {
		    // Only one timeline can play at a time.
		    if (this.sonification.timeline) {
		        this.sonification.timeline.pause();
		    }

		    // Calculate data extremes for the props used
		    var dataExtremes = getExtremesForInstrumentProps(
		        this, options.instruments, options.dataExtremes
		    );

		    // Figure out ordering of series and custom paths
		    var order = buildPathOrder(options.order, this, function (series) {
		        return buildSeriesOptions(series, dataExtremes, options);
		    });

		    // Add waits after simultaneous paths with series in them.
		    order = addAfterSeriesWaits(order, options.afterSeriesWait || 0);

		    // We now have a list of either TimelinePath objects or series that need to
		    // be converted to TimelinePath objects. Convert everything to paths.
		    var paths = buildPathsFromOrder(order, options.duration);

		    // Sync simultaneous paths
		    paths.forEach(function (simultaneousPaths) {
		        syncSimultaneousPaths(simultaneousPaths);
		    });

		    // We have a set of paths. Create the timeline, and play it.
		    this.sonification.timeline = new H.sonification.Timeline({
		        paths: paths,
		        onEnd: options.onEnd
		    });
		    this.sonification.timeline.play();
		}


		/**
		 * Get a list of the points currently under cursor.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#getCurrentSonifyPoints
		 *
		 * @return {Array<Highcharts.Point>}
		 *         The points currently under the cursor.
		 */
		function getCurrentPoints() {
		    var cursorObj;
		    if (this.sonification.timeline) {
		        cursorObj = this.sonification.timeline.getCursor(); // Cursor per pathID
		        return Object.keys(cursorObj).map(function (path) {
		            // Get the event objects under cursor for each path
		            return cursorObj[path].eventObject;
		        }).filter(function (eventObj) {
		            // Return the events that are points
		            return eventObj instanceof H.Point;
		        });
		    }
		    return [];
		}


		/**
		 * Set the cursor to a point or set of points in different series.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#setSonifyCursor
		 *
		 * @param {Highcharts.Point|Array<Highcharts.Point>} points
		 *        The point or points to set the cursor to. If setting multiple points
		 *        under the cursor, the points have to be in different series that are
		 *        being played simultaneously.
		 */
		function setCursor(points) {
		    var timeline = this.sonification.timeline;
		    if (timeline) {
		        H.splat(points).forEach(function (point) {
		            // We created the events with the ID of the points, which makes
		            // this easy. Just call setCursor for each ID.
		            timeline.setCursor(point.id);
		        });
		    }
		}


		/**
		 * Pause the running sonification.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#pauseSonify
		 *
		 * @param {boolean} [fadeOut=true]
		 *        Fade out as we pause to avoid clicks.
		 */
		function pause(fadeOut) {
		    if (this.sonification.timeline) {
		        this.sonification.timeline.pause(H.pick(fadeOut, true));
		    } else if (this.sonification.currentlyPlayingPoint) {
		        this.sonification.currentlyPlayingPoint.cancelSonify(fadeOut);
		    }
		}


		/**
		 * Resume the currently running sonification. Requires series.sonify or
		 * chart.sonify to have been played at some point earlier.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#resumeSonify
		 *
		 * @param {Function} onEnd
		 *        Callback to call when play finished.
		 */
		function resume(onEnd) {
		    if (this.sonification.timeline) {
		        this.sonification.timeline.play(onEnd);
		    }
		}


		/**
		 * Play backwards from cursor. Requires series.sonify or chart.sonify to have
		 * been played at some point earlier.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#rewindSonify
		 *
		 * @param {Function} onEnd
		 *        Callback to call when play finished.
		 */
		function rewind(onEnd) {
		    if (this.sonification.timeline) {
		        this.sonification.timeline.rewind(onEnd);
		    }
		}


		/**
		 * Cancel current sonification and reset cursor.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#cancelSonify
		 *
		 * @param {boolean} [fadeOut=true]
		 *        Fade out as we pause to avoid clicks.
		 */
		function cancel(fadeOut) {
		    this.pauseSonify(fadeOut);
		    this.resetSonifyCursor();
		}


		/**
		 * Reset cursor to start. Requires series.sonify or chart.sonify to have been
		 * played at some point earlier.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#resetSonifyCursor
		 */
		function resetCursor() {
		    if (this.sonification.timeline) {
		        this.sonification.timeline.resetCursor();
		    }
		}


		/**
		 * Reset cursor to end. Requires series.sonify or chart.sonify to have been
		 * played at some point earlier.
		 *
		 * @requires module:modules/sonification
		 *
		 * @function Highcharts.Chart#resetSonifyCursorEnd
		 */
		function resetCursorEnd() {
		    if (this.sonification.timeline) {
		        this.sonification.timeline.resetCursorEnd();
		    }
		}


		// Export functions
		var chartSonifyFunctions = {
		    chartSonify: chartSonify,
		    seriesSonify: seriesSonify,
		    pause: pause,
		    resume: resume,
		    rewind: rewind,
		    cancel: cancel,
		    getCurrentPoints: getCurrentPoints,
		    setCursor: setCursor,
		    resetCursor: resetCursor,
		    resetCursorEnd: resetCursorEnd
		};

		return chartSonifyFunctions;
	}(Highcharts, utilities));
	var timelineClasses = (function (H, utilities) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  TimelineEvent class definition.
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */

		/**
		 * A set of options for the TimelineEvent class.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @interface Highcharts.TimelineEventOptionsObject
		 *//**
		 * The object we want to sonify when playing the TimelineEvent. Can be any
		 * object that implements the `sonify` and `cancelSonify` functions. If this is
		 * not supplied, the TimelineEvent is considered a silent event, and the onEnd
		 * event is immediately called.
		 * @name Highcharts.TimelineEventOptionsObject#eventObject
		 * @type {*}
		 *//**
		 * Options to pass on to the eventObject when playing it.
		 * @name Highcharts.TimelineEventOptionsObject#playOptions
		 * @type {object|undefined}
		 *//**
		 * The time at which we want this event to play (in milliseconds offset). This
		 * is not used for the TimelineEvent.play function, but rather intended as a
		 * property to decide when to call TimelineEvent.play. Defaults to 0.
		 * @name Highcharts.TimelineEventOptionsObject#time
		 * @type {number|undefined}
		 *//**
		 * Unique ID for the event. Generated automatically if not supplied.
		 * @name Highcharts.TimelineEventOptionsObject#id
		 * @type {string|undefined}
		 *//**
		 * Callback called when the play has finished.
		 * @name Highcharts.TimelineEventOptionsObject#onEnd
		 * @type {Function|undefined}
		 */





		/**
		 * The TimelineEvent class. Represents a sound event on a timeline.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @class
		 * @name Highcharts.TimelineEvent
		 *
		 * @param {Highcharts.TimelineEventOptionsObject} options
		 *        Options for the TimelineEvent.
		 */
		function TimelineEvent(options) {
		    this.init(options || {});
		}
		TimelineEvent.prototype.init = function (options) {
		    this.options = options;
		    this.time = options.time || 0;
		    this.id = this.options.id = options.id || H.uniqueKey();
		};


		/**
		 * Play the event. Does not take the TimelineEvent.time option into account,
		 * and plays the event immediately.
		 *
		 * @function Highcharts.TimelineEvent#play
		 *
		 * @param {Highcharts.TimelineEventOptionsObject} [options]
		 *        Options to pass in to the eventObject when playing it.
		 */
		TimelineEvent.prototype.play = function (options) {
		    var eventObject = this.options.eventObject,
		        masterOnEnd = this.options.onEnd,
		        playOnEnd = options && options.onEnd,
		        playOptionsOnEnd = this.options.playOptions &&
		            this.options.playOptions.onEnd,
		        playOptions = H.merge(this.options.playOptions, options);

		    if (eventObject && eventObject.sonify) {
		        // If we have multiple onEnds defined, use all
		        playOptions.onEnd = masterOnEnd || playOnEnd || playOptionsOnEnd ?
		            function () {
		                var args = arguments;
		                [masterOnEnd, playOnEnd, playOptionsOnEnd].forEach(
		                    function (onEnd) {
		                        if (onEnd) {
		                            onEnd.apply(this, args);
		                        }
		                    }
		                );
		            } : undefined;

		        eventObject.sonify(playOptions);
		    } else {
		        if (playOnEnd) {
		            playOnEnd();
		        }
		        if (masterOnEnd) {
		            masterOnEnd();
		        }
		    }
		};


		/**
		 * Cancel the sonification of this event. Does nothing if the event is not
		 * currently sonifying.
		 *
		 * @function Highcharts.TimelineEvent#cancel
		 *
		 * @param {boolean} [fadeOut=false]
		 *        Whether or not to fade out as we stop. If false, the event is
		 *        cancelled synchronously.
		 */
		TimelineEvent.prototype.cancel = function (fadeOut) {
		    this.options.eventObject.cancelSonify(fadeOut);
		};


		/**
		 * A set of options for the TimelinePath class.
		 *
		 * @requires module:modules/
		 *
		 * @private
		 * @interface Highcharts.TimelinePathOptionsObject
		 *//**
		 * List of TimelineEvents to play on this track.
		 * @name Highcharts.TimelinePathOptionsObject#events
		 * @type {Array<Highcharts.TimelineEvent>}
		 *//**
		 * If this option is supplied, this path ignores all events and just waits for
		 * the specified number of milliseconds before calling onEnd.
		 * @name Highcharts.TimelinePathOptionsObject#silentWait
		 * @type {number|undefined}
		 *//**
		 * Unique ID for this timeline path. Automatically generated if not supplied.
		 * @name Highcharts.TimelinePathOptionsObject#id
		 * @type {string|undefined}
		 *//**
		 * Callback called before the path starts playing.
		 * @name Highcharts.TimelinePathOptionsObject#onStart
		 * @type {Function|undefined}
		 *//**
		 * Callback function to call before an event plays.
		 * @name Highcharts.TimelinePathOptionsObject#onEventStart
		 * @type {Function|undefined}
		 *//**
		 * Callback function to call after an event has stopped playing.
		 * @name Highcharts.TimelinePathOptionsObject#onEventEnd
		 * @type {Function|undefined}
		 *//**
		 * Callback called when the whole path is finished.
		 * @name Highcharts.TimelinePathOptionsObject#onEnd
		 * @type {Function|undefined}
		 */


		/**
		 * The TimelinePath class. Represents a track on a timeline with a list of
		 * sound events to play at certain times relative to each other.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @class
		 * @name Highcharts.TimelinePath
		 *
		 * @param {Highcharts.TimelinePathOptionsObject} options
		 *        Options for the TimelinePath.
		 */
		function TimelinePath(options) {
		    this.init(options);
		}
		TimelinePath.prototype.init = function (options) {
		    this.options = options;
		    this.id = this.options.id = options.id || H.uniqueKey();
		    this.cursor = 0;
		    this.eventsPlaying = {};

		    // Handle silent wait, otherwise use events from options
		    this.events =
		        options.silentWait ?
		        [
		            new TimelineEvent({ time: 0 }),
		            new TimelineEvent({ time: options.silentWait })
		        ] :
		        this.options.events;

		    // We need to sort our events by time
		    this.sortEvents();

		    // Get map from event ID to index
		    this.updateEventIdMap();

		    // Signal events to fire
		    this.signalHandler = new utilities.SignalHandler(
		        ['playOnEnd', 'masterOnEnd', 'onStart', 'onEventStart', 'onEventEnd']
		    );
		    this.signalHandler.registerSignalCallbacks(
		        H.merge(options, { masterOnEnd: options.onEnd })
		    );
		};


		/**
		 * Sort the internal event list by time.
		 * @private
		 */
		TimelinePath.prototype.sortEvents = function () {
		    this.events = this.events.sort(function (a, b) {
		        return a.time - b.time;
		    });
		};


		/**
		 * Update the internal eventId to index map.
		 * @private
		 */
		TimelinePath.prototype.updateEventIdMap = function () {
		    this.eventIdMap = this.events.reduce(function (acc, cur, i) {
		        acc[cur.id] = i;
		        return acc;
		    }, {});
		};


		/**
		 * Add events to the path. Should not be done while the path is playing.
		 * The new events are inserted according to their time property.
		 * @private
		 * @param {Array<Highcharts.TimelineEvent>} newEvents - The new timeline events
		 * to add.
		 */
		TimelinePath.prototype.addTimelineEvents = function (newEvents) {
		    this.events = this.events.concat(newEvents);
		    this.sortEvents(); // Sort events by time
		    this.updateEventIdMap(); // Update the event ID to index map
		};


		/**
		 * Get the current TimelineEvent under the cursor.
		 * @private
		 * @return {Highcharts.TimelineEvent} The current timeline event.
		 */
		TimelinePath.prototype.getCursor = function () {
		    return this.events[this.cursor];
		};


		/**
		 * Set the current TimelineEvent under the cursor.
		 * @private
		 * @param {string} eventId - The ID of the timeline event to set as current.
		 * @return {boolean} True if there is an event with this ID in the path. False
		 * otherwise.
		 */
		TimelinePath.prototype.setCursor = function (eventId) {
		    var ix = this.eventIdMap[eventId];
		    if (ix !== undefined) {
		        this.cursor = ix;
		        return true;
		    }
		    return false;
		};


		/**
		 * Play the timeline from the current cursor.
		 * @private
		 * @param {Function} onEnd - Callback to call when play finished. Does not
		 * override other onEnd callbacks.
		 */
		TimelinePath.prototype.play = function (onEnd) {
		    this.pause();
		    this.signalHandler.emitSignal('onStart');
		    this.signalHandler.clearSignalCallbacks(['playOnEnd']);
		    this.signalHandler.registerSignalCallbacks({ playOnEnd: onEnd });
		    this.playEvents(1);
		};


		/**
		 * Play the timeline backwards from the current cursor.
		 * @private
		 * @param {Function} onEnd - Callback to call when play finished. Does not
		 * override other onEnd callbacks.
		 */
		TimelinePath.prototype.rewind = function (onEnd) {
		    this.pause();
		    this.signalHandler.emitSignal('onStart');
		    this.signalHandler.clearSignalCallbacks(['playOnEnd']);
		    this.signalHandler.registerSignalCallbacks({ playOnEnd: onEnd });
		    this.playEvents(-1);
		};


		/**
		 * Reset the cursor to the beginning.
		 * @private
		 */
		TimelinePath.prototype.resetCursor = function () {
		    this.cursor = 0;
		};


		/**
		 * Reset the cursor to the end.
		 * @private
		 */
		TimelinePath.prototype.resetCursorEnd = function () {
		    this.cursor = this.events.length - 1;
		};


		/**
		 * Cancel current playing. Leaves the cursor intact.
		 * @private
		 * @param {boolean} [fadeOut=false] - Whether or not to fade out as we stop. If
		 * false, the path is cancelled synchronously.
		 */
		TimelinePath.prototype.pause = function (fadeOut) {
		    var timelinePath = this;

		    // Cancel next scheduled play
		    clearTimeout(timelinePath.nextScheduledPlay);

		    // Cancel currently playing events
		    Object.keys(timelinePath.eventsPlaying).forEach(function (id) {
		        if (timelinePath.eventsPlaying[id]) {
		            timelinePath.eventsPlaying[id].cancel(fadeOut);
		        }
		    });
		    timelinePath.eventsPlaying = {};
		};


		/**
		 * Play the events, starting from current cursor, and going in specified
		 * direction.
		 * @private
		 * @param {number} direction - The direction to play, 1 for forwards and -1 for
		 * backwards.
		 */
		TimelinePath.prototype.playEvents = function (direction) {
		    var timelinePath = this,
		        curEvent = timelinePath.events[this.cursor],
		        nextEvent = timelinePath.events[this.cursor + direction],
		        timeDiff,
		        onEnd = function (signalData) {
		            timelinePath.signalHandler.emitSignal(
		                'masterOnEnd', signalData
		            );
		            timelinePath.signalHandler.emitSignal(
		                'playOnEnd', signalData
		            );
		        };

		    // Store reference to path on event
		    curEvent.timelinePath = timelinePath;

		    // Emit event, cancel if returns false
		    if (
		        timelinePath.signalHandler.emitSignal(
		            'onEventStart', curEvent
		        ) === false
		    ) {
		        onEnd({
		            event: curEvent,
		            cancelled: true
		        });
		        return;
		    }

		    // Play the current event
		    timelinePath.eventsPlaying[curEvent.id] = curEvent;
		    curEvent.play({
		        onEnd: function (cancelled) {
		            var signalData = {
		                event: curEvent,
		                cancelled: !!cancelled
		            };

		            // Keep track of currently playing events for cancelling
		            delete timelinePath.eventsPlaying[curEvent.id];

		            // Handle onEventEnd
		            timelinePath.signalHandler.emitSignal('onEventEnd', signalData);

		            // Reached end of path?
		            if (!nextEvent) {
		                onEnd(signalData);
		            }
		        }
		    });

		    // Schedule next
		    if (nextEvent) {
		        timeDiff = Math.abs(nextEvent.time - curEvent.time);
		        if (timeDiff < 1) {
		            // Play immediately
		            timelinePath.cursor += direction;
		            timelinePath.playEvents(direction);
		        } else {
		            // Schedule after the difference in ms
		            this.nextScheduledPlay = setTimeout(function () {
		                timelinePath.cursor += direction;
		                timelinePath.playEvents(direction);
		            }, timeDiff);
		        }
		    }
		};



		/* ************************************************************************** *
		 *  TIMELINE                                                                  *
		 * ************************************************************************** */


		/**
		 * A set of options for the Timeline class.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @interface Highcharts.TimelineOptionsObject
		 *//**
		 * List of TimelinePaths to play. Multiple paths can be grouped together and
		 * played simultaneously by supplying an array of paths in place of a single
		 * path.
		 * @name Highcharts.TimelineOptionsObject#paths
		 * @type {Array<Highcharts.TimelinePath|Array<Highcharts.TimelinePath>>}
		 *//**
		 * Callback function to call before a path plays.
		 * @name Highcharts.TimelineOptionsObject#onPathStart
		 * @type {Function|undefined}
		 *//**
		 * Callback function to call after a path has stopped playing.
		 * @name Highcharts.TimelineOptionsObject#onPathEnd
		 * @type {Function|undefined}
		 *//**
		 * Callback called when the whole path is finished.
		 * @name Highcharts.TimelineOptionsObject#onEnd
		 * @type {Function|undefined}
		 */


		/**
		 * The Timeline class. Represents a sonification timeline with a list of
		 * timeline paths with events to play at certain times relative to each other.
		 *
		 * @requires module:modules/sonification
		 *
		 * @private
		 * @class
		 * @name Highcharts.Timeline
		 *
		 * @param {Highcharts.TimelineOptionsObject} options
		 *        Options for the Timeline.
		 */
		function Timeline(options) {
		    this.init(options || {});
		}
		Timeline.prototype.init = function (options) {
		    this.options = options;
		    this.cursor = 0;
		    this.paths = options.paths;
		    this.pathsPlaying = {};
		    this.signalHandler = new utilities.SignalHandler(
		        ['playOnEnd', 'masterOnEnd', 'onPathStart', 'onPathEnd']
		    );
		    this.signalHandler.registerSignalCallbacks(
		        H.merge(options, { masterOnEnd: options.onEnd })
		    );
		};


		/**
		 * Play the timeline forwards from cursor.
		 * @private
		 * @param {Function} onEnd - Callback to call when play finished. Does not
		 * override other onEnd callbacks.
		 */
		Timeline.prototype.play = function (onEnd) {
		    this.pause();
		    this.signalHandler.clearSignalCallbacks(['playOnEnd']);
		    this.signalHandler.registerSignalCallbacks({ playOnEnd: onEnd });
		    this.playPaths(1);
		};


		/**
		 * Play the timeline backwards from cursor.
		 * @private
		 * @param {Function} onEnd - Callback to call when play finished. Does not
		 * override other onEnd callbacks.
		 */
		Timeline.prototype.rewind = function (onEnd) {
		    this.pause();
		    this.signalHandler.clearSignalCallbacks(['playOnEnd']);
		    this.signalHandler.registerSignalCallbacks({ playOnEnd: onEnd });
		    this.playPaths(-1);
		};


		/**
		 * Play the timeline in the specified direction.
		 * @private
		 * @param {number} direction - Direction to play in. 1 for forwards, -1 for
		 * backwards.
		 */
		Timeline.prototype.playPaths = function (direction) {
		    var curPaths = H.splat(this.paths[this.cursor]),
		        nextPaths = this.paths[this.cursor + direction],
		        timeline = this,
		        signalHandler = this.signalHandler,
		        pathsEnded = 0,
		        // Play a path
		        playPath = function (path) {
		            // Emit signal and set playing state
		            signalHandler.emitSignal('onPathStart', path);
		            timeline.pathsPlaying[path.id] = path;
		            // Do the play
		            path[direction > 0 ? 'play' : 'rewind'](function (callbackData) {
		                // Play ended callback
		                // Data to pass to signal callbacks
		                var cancelled = callbackData && callbackData.cancelled,
		                    signalData = {
		                        path: path,
		                        cancelled: cancelled
		                    };

		                // Clear state and send signal
		                delete timeline.pathsPlaying[path.id];
		                signalHandler.emitSignal('onPathEnd', signalData);

		                // Handle next paths
		                pathsEnded++;
		                if (pathsEnded >= curPaths.length) {
		                    // We finished all of the current paths for cursor.
		                    if (nextPaths && !cancelled) {
		                        // We have more paths, move cursor along
		                        timeline.cursor += direction;
		                        // Reset upcoming path cursors before playing
		                        H.splat(nextPaths).forEach(function (nextPath) {
		                            nextPath[
		                                direction > 0 ? 'resetCursor' : 'resetCursorEnd'
		                            ]();
		                        });
		                        // Play next
		                        timeline.playPaths(direction);
		                    } else {
		                        // If it is the last path in this direction, call onEnd
		                        signalHandler.emitSignal('playOnEnd', signalData);
		                        signalHandler.emitSignal('masterOnEnd', signalData);
		                    }
		                }
		            });
		        };

		    // Go through the paths under cursor and play them
		    curPaths.forEach(function (path) {
		        if (path) {
		            // Store reference to timeline
		            path.timeline = timeline;

		            // Leave a timeout to let notes fade out before next play
		            setTimeout(function () {
		                playPath(path);
		            }, H.sonification.fadeOutTime);
		        }
		    });
		};


		/**
		 * Stop the playing of the timeline. Cancels all current sounds, but does not
		 * affect the cursor.
		 * @private
		 * @param {boolean} [fadeOut=false] - Whether or not to fade out as we stop. If
		 * false, the timeline is cancelled synchronously.
		 */
		Timeline.prototype.pause = function (fadeOut) {
		    var timeline = this;

		    // Cancel currently playing events
		    Object.keys(timeline.pathsPlaying).forEach(function (id) {
		        if (timeline.pathsPlaying[id]) {
		            timeline.pathsPlaying[id].pause(fadeOut);
		        }
		    });
		    timeline.pathsPlaying = {};
		};


		/**
		 * Reset the cursor to the beginning of the timeline.
		 * @private
		 */
		Timeline.prototype.resetCursor = function () {
		    this.paths.forEach(function (paths) {
		        H.splat(paths).forEach(function (path) {
		            path.resetCursor();
		        });
		    });
		    this.cursor = 0;
		};


		/**
		 * Reset the cursor to the end of the timeline.
		 * @private
		 */
		Timeline.prototype.resetCursorEnd = function () {
		    this.paths.forEach(function (paths) {
		        H.splat(paths).forEach(function (path) {
		            path.resetCursorEnd();
		        });
		    });
		    this.cursor = this.paths.length - 1;
		};


		/**
		 * Set the current TimelineEvent under the cursor. If multiple paths are being
		 * played at the same time, this function only affects a single path (the one
		 * that contains the eventId that is passed in).
		 * @private
		 * @param {string} eventId - The ID of the timeline event to set as current.
		 * @return {boolean} True if the cursor was set, false if no TimelineEvent was
		 * found for this ID.
		 */
		Timeline.prototype.setCursor = function (eventId) {
		    return this.paths.some(function (paths) {
		        return H.splat(paths).some(function (path) {
		            return path.setCursor(eventId);
		        });
		    });
		};


		/**
		 * Get the current TimelineEvents under the cursors. This function will return
		 * the event under the cursor for each currently playing path, as an object
		 * where the path ID is mapped to the TimelineEvent under that path's cursor.
		 * @private
		 * @return {object} The TimelineEvents under each path's cursors.
		 */
		Timeline.prototype.getCursor = function () {
		    return this.getCurrentPlayingPaths().reduce(function (acc, cur) {
		        acc[cur.id] = cur.getCursor();
		        return acc;
		    }, {});
		};


		/**
		 * Check if timeline is reset or at start.
		 * @private
		 * @return {boolean} True if timeline is at the beginning.
		 */
		Timeline.prototype.atStart = function () {
		    return !this.getCurrentPlayingPaths().some(function (path) {
		        return path.cursor;
		    });
		};


		/**
		 * Get the current TimelinePaths being played.
		 * @private
		 * @return {Array<Highcharts.TimelinePath>} The TimelinePaths currently being
		 * played.
		 */
		Timeline.prototype.getCurrentPlayingPaths = function () {
		    return H.splat(this.paths[this.cursor]);
		};


		// Export the classes
		var timelineClasses = {
		    TimelineEvent: TimelineEvent,
		    TimelinePath: TimelinePath,
		    Timeline: Timeline
		};

		return timelineClasses;
	}(Highcharts, utilities));
	(function (H, Instrument, instruments, Earcon, pointSonifyFunctions, chartSonifyFunctions, utilities, TimelineClasses) {
		/* *
		 *
		 *  (c) 2009-2018 Øystein Moseng
		 *
		 *  Sonification module for Highcharts
		 *
		 *  License: www.highcharts.com/license
		 *
		 * */



		// Expose on the Highcharts object

		/**
		 * Global classes and objects related to sonification.
		 *
		 * @requires module:modules/sonification
		 *
		 * @name Highcharts.sonification
		 * @type {Highcharts.SonificationObject}
		 */

		/**
		 * Global classes and objects related to sonification.
		 *
		 * @requires module:modules/sonification
		 *
		 * @interface Highcharts.SonificationObject
		 *//**
		 * Note fade-out-time in milliseconds. Most notes are faded out quickly by
		 * default if there is time. This is to avoid abrupt stops which will cause
		 * perceived clicks.
		 * @name Highcharts.SonificationObject#fadeOutDuration
		 * @type {number}
		 *//**
		 * Utility functions.
		 * @name Highcharts.SonificationObject#utilities
		 * @private
		 * @type {object}
		 *//**
		 * The Instrument class.
		 * @name Highcharts.SonificationObject#Instrument
		 * @type {Function}
		 *//**
		 * Predefined instruments, given as an object with a map between the instrument
		 * name and the Highcharts.Instrument object.
		 * @name Highcharts.SonificationObject#instruments
		 * @type {Object}
		 *//**
		 * The Earcon class.
		 * @name Highcharts.SonificationObject#Earcon
		 * @type {Function}
		 *//**
		 * The TimelineEvent class.
		 * @private
		 * @name Highcharts.SonificationObject#TimelineEvent
		 * @type {Function}
		 *//**
		 * The TimelinePath class.
		 * @private
		 * @name Highcharts.SonificationObject#TimelinePath
		 * @type {Function}
		 *//**
		 * The Timeline class.
		 * @private
		 * @name Highcharts.SonificationObject#Timeline
		 * @type {Function}
		 */
		H.sonification = {
		    fadeOutDuration: 20,

		    // Classes and functions
		    utilities: utilities,
		    Instrument: Instrument,
		    instruments: instruments,
		    Earcon: Earcon,
		    TimelineEvent: TimelineClasses.TimelineEvent,
		    TimelinePath: TimelineClasses.TimelinePath,
		    Timeline: TimelineClasses.Timeline
		};

		// Chart specific
		H.Point.prototype.sonify = pointSonifyFunctions.pointSonify;
		H.Point.prototype.cancelSonify = pointSonifyFunctions.pointCancelSonify;
		H.Series.prototype.sonify = chartSonifyFunctions.seriesSonify;
		H.extend(H.Chart.prototype, {
		    sonify: chartSonifyFunctions.chartSonify,
		    pauseSonify: chartSonifyFunctions.pause,
		    resumeSonify: chartSonifyFunctions.resume,
		    rewindSonify: chartSonifyFunctions.rewind,
		    cancelSonify: chartSonifyFunctions.cancel,
		    getCurrentSonifyPoints: chartSonifyFunctions.getCurrentPoints,
		    setSonifyCursor: chartSonifyFunctions.setCursor,
		    resetSonifyCursor: chartSonifyFunctions.resetCursor,
		    resetSonifyCursorEnd: chartSonifyFunctions.resetCursorEnd,
		    sonification: {}
		});

	}(Highcharts, Instrument, instruments, Earcon, pointSonifyFunctions, chartSonifyFunctions, utilities, timelineClasses));
	return (function () {




	}());
}));
