mirror of
https://github.com/Tonejs/Tone.js
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83 lines
2 KiB
JavaScript
83 lines
2 KiB
JavaScript
define(["Tone/core/Tone", "Tone/effect/Effect", "Tone/signal/Signal", "Tone/signal/Multiply"], function(Tone){
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"use strict";
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/**
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* @class Feedback Effect (a sound loop between an audio source and its own output)
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*
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* @constructor
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* @extends {Tone.Effect}
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* @param {number|Object=} [initialFeedback=0.125] the initial feedback value
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*/
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Tone.FeedbackEffect = function(){
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var options = this.optionsObject(arguments, ["feedback"]);
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options = this.defaultArg(options, Tone.FeedbackEffect.defaults);
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Tone.Effect.call(this, options);
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/**
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* controls the amount of feedback
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* @type {Tone.Signal}
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*/
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this.feedback = new Tone.Signal(options.feedback);
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/**
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* the gain which controls the feedback
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* @type {GainNode}
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* @private
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*/
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this._feedbackGain = this.context.createGain();
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//the feedback loop
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this.effectReturn.chain(this._feedbackGain, this.effectSend);
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this.feedback.connect(this._feedbackGain.gain);
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};
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Tone.extend(Tone.FeedbackEffect, Tone.Effect);
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/**
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* @static
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* @type {Object}
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*/
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Tone.FeedbackEffect.defaults = {
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"feedback" : 0.125
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};
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/**
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* set the feedback amount
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*
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* @param {number} value the amount of feedback
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* @param {Tone.Time=} rampTime (optionally) set the ramp time it takes
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* to reach the new feedback value
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*/
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Tone.FeedbackEffect.prototype.setFeedback = function(value, rampTime){
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if (rampTime){
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this.feedback.linearRampToValueNow(value, rampTime);
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} else {
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this.feedback.setValue(value);
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}
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};
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/**
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* set the parameters in bulk
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* @param {Object} params
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*/
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Tone.FeedbackEffect.prototype.set = function(params){
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if (!this.isUndef(params.feedback)) this.setFeedback(params.feedback);
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Tone.Effect.prototype.set.call(this, params);
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};
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/**
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* clean up
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*/
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Tone.FeedbackEffect.prototype.dispose = function(){
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Tone.Effect.prototype.dispose.call(this);
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this.feedback.dispose();
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this.feedback = null;
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this._feedbackGain.disconnect();
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this._feedbackGain = null;
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};
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return Tone.FeedbackEffect;
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});
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