mirror of
https://github.com/Tonejs/Tone.js
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72 lines
No EOL
1.7 KiB
JavaScript
72 lines
No EOL
1.7 KiB
JavaScript
define(["Tone/core/Tone", "Tone/component/Follower", "Tone/signal/GreaterThan"], function(Tone){
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/**
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* @class Only pass signal through when it's signal exceeds the
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* specified threshold.
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*
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* @constructor
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* @extends {Tone}
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* @param {number=} [thresh = -40] the threshold in Decibels
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* @param {number=} [smoothTime = 0.1] the amount of smoothing applied to the
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* incoming signal
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*/
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Tone.Gate = function(thresh, smoothTime){
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Tone.call(this);
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//default values
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thresh = this.defaultArg(thresh, -40);
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smoothTime = this.defaultArg(smoothTime, 0.1);
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/**
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* @type {Tone.Follower}
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* @private
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*/
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this._follower = new Tone.Follower(smoothTime);
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/**
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* @type {Tone.GreaterThan}
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* @private
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*/
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this._gt = new Tone.GreaterThan(this.dbToGain(thresh));
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//the connections
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this.chain(this.input, this.output);
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//the control signal
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this.chain(this.input, this._follower, this._gt, this.output.gain);
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this.output.gain.value = 0;
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};
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Tone.extend(Tone.Gate);
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/**
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* set the gating threshold
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* @param {number} thresh the gating threshold
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*/
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Tone.Gate.prototype.setThreshold = function(thresh){
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this._gt.setValue(this.dbToGain(thresh));
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};
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/**
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* set the amount of smoothing applied to the incoming signal
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* @param {Tone.Time} smoothTime
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*/
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Tone.Gate.prototype.setSmoothTime = function(smoothTime){
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this._follower.setSmoothTime(smoothTime);
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};
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/**
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* dispose
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*/
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Tone.Gate.prototype.dispose = function(){
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this._follower.dispose();
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this._gt.dispose();
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this.input.disconnect();
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this.output.disconnect();
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this._follower = null;
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this._gt = null;
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this.input = null;
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this.output = null;
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};
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return Tone.Gate;
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}); |