mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 16:48:00 +00:00
83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
define(["Tone/core/Tone", "Tone/effect/Effect", "Tone/signal/Signal", "Tone/signal/Multiply"], function(Tone){
|
|
|
|
"use strict";
|
|
|
|
/**
|
|
* @class Feedback Effect (a sound loop between an audio source and its own output)
|
|
*
|
|
* @constructor
|
|
* @extends {Tone.Effect}
|
|
* @param {number|object=} [initialFeedback=0.25] the initial feedback value (defaults to 0.25)
|
|
*/
|
|
Tone.FeedbackEffect = function(){
|
|
|
|
var options = this.optionsObject(arguments, ["feedback"]);
|
|
options = this.defaultArg(options, Tone.FeedbackEffect.defaults);
|
|
|
|
Tone.Effect.call(this, options);
|
|
|
|
/**
|
|
* controls the amount of feedback
|
|
* @type {Tone.Signal}
|
|
*/
|
|
this.feedback = new Tone.Signal(options.feedback);
|
|
|
|
/**
|
|
* the gain which controls the feedback
|
|
* @type {GainNode}
|
|
* @private
|
|
*/
|
|
this._feedbackGain = this.context.createGain();
|
|
|
|
//the feedback loop
|
|
this.effectReturn.chain(this._feedbackGain, this.effectSend);
|
|
this.feedback.connect(this._feedbackGain.gain);
|
|
};
|
|
|
|
Tone.extend(Tone.FeedbackEffect, Tone.Effect);
|
|
|
|
/**
|
|
* @static
|
|
* @type {Object}
|
|
*/
|
|
Tone.FeedbackEffect.defaults = {
|
|
"feedback" : 0.125
|
|
};
|
|
|
|
/**
|
|
* set the feedback amount
|
|
*
|
|
* @param {number} value the amount of feedback
|
|
* @param {Tone.Time=} rampTime (optionally) set the ramp time it takes
|
|
* to reach the new feedback value
|
|
*/
|
|
Tone.FeedbackEffect.prototype.setFeedback = function(value, rampTime){
|
|
if (rampTime){
|
|
this.feedback.linearRampToValueNow(value, rampTime);
|
|
} else {
|
|
this.feedback.setValue(value);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* set the parameters in bulk
|
|
* @param {Object} params
|
|
*/
|
|
Tone.FeedbackEffect.prototype.set = function(params){
|
|
if (!this.isUndef(params.feedback)) this.setFeedback(params.feedback);
|
|
Tone.Effect.prototype.set.call(this, params);
|
|
};
|
|
|
|
/**
|
|
* clean up
|
|
*/
|
|
Tone.FeedbackEffect.prototype.dispose = function(){
|
|
Tone.Effect.prototype.dispose.call(this);
|
|
this.feedback.dispose();
|
|
this.feedback = null;
|
|
this._feedbackGain.disconnect();
|
|
this._feedbackGain = null;
|
|
};
|
|
|
|
return Tone.FeedbackEffect;
|
|
});
|