mirror of
https://github.com/Tonejs/Tone.js
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111 lines
No EOL
2.6 KiB
JavaScript
111 lines
No EOL
2.6 KiB
JavaScript
define(["Tone/core/Tone", "Tone/instrument/Instrument", "Tone/source/Noise", "Tone/component/LowpassCombFilter"], function(Tone){
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"use strict";
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/**
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* @class Karplus-String string synthesis. Often out of tune.
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* Will change when the AudioWorkerNode is available across
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* browsers.
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*
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* @constructor
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* @extends {Tone.Instrument}
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* @param {Object} [options] see the defaults
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* @example
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* var plucky = new Tone.PluckSynth().toMaster();
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* plucky.triggerAttack("C4");
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*/
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Tone.PluckSynth = function(options){
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options = this.defaultArg(options, Tone.PluckSynth.defaults);
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Tone.Instrument.call(this, options);
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/**
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* @type {Tone.Noise}
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* @private
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*/
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this._noise = new Tone.Noise("pink");
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/**
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* The amount of noise at the attack.
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* Nominal range of [0.1, 20]
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* @type {number}
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*/
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this.attackNoise = options.attackNoise;
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/**
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* the LFCF
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* @type {Tone.LowpassCombFilter}
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* @private
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*/
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this._lfcf = new Tone.LowpassCombFilter({
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"resonance" : options.resonance,
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"dampening" : options.dampening
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});
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/**
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* The resonance control.
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* @type {NormalRange}
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* @signal
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*/
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this.resonance = this._lfcf.resonance;
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/**
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* The dampening control. i.e. the lowpass filter frequency of the comb filter
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* @type {Frequency}
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* @signal
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*/
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this.dampening = this._lfcf.dampening;
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//connections
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this._noise.connect(this._lfcf);
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this._lfcf.connect(this.output);
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this._readOnly(["resonance", "dampening"]);
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};
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Tone.extend(Tone.PluckSynth, Tone.Instrument);
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/**
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* @static
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* @const
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* @type {Object}
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*/
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Tone.PluckSynth.defaults = {
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"attackNoise" : 1,
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"dampening" : 4000,
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"resonance" : 0.9
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};
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/**
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* Trigger the note.
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* @param {Frequency} note The note to trigger.
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* @param {Time} [time=now] When the note should be triggered.
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* @returns {Tone.PluckSynth} this
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*/
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Tone.PluckSynth.prototype.triggerAttack = function(note, time) {
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note = this.toFrequency(note);
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time = this.toSeconds(time);
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var delayAmount = 1 / note;
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this._lfcf.delayTime.setValueAtTime(delayAmount, time);
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this._noise.start(time);
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this._noise.stop(time + delayAmount * this.attackNoise);
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return this;
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};
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/**
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* Clean up.
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* @returns {Tone.PluckSynth} this
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*/
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Tone.PluckSynth.prototype.dispose = function(){
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Tone.Instrument.prototype.dispose.call(this);
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this._noise.dispose();
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this._lfcf.dispose();
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this._noise = null;
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this._lfcf = null;
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this._writable(["resonance", "dampening"]);
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this.dampening = null;
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this.resonance = null;
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return this;
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};
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return Tone.PluckSynth;
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}); |