mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-17 00:58:09 +00:00
af85ae7e19
Fixes #17
70 lines
No EOL
1.6 KiB
JavaScript
70 lines
No EOL
1.6 KiB
JavaScript
define(["Tone/core/Tone", "Tone/component/Follower", "Tone/signal/GreaterThan"], function(Tone){
|
|
|
|
"use strict";
|
|
|
|
/**
|
|
* @class Only pass signal through when it's signal exceeds the
|
|
* specified threshold.
|
|
*
|
|
* @constructor
|
|
* @extends {Tone}
|
|
* @param {number=} [thresh = -40] the threshold in Decibels
|
|
* @param {number=} [smoothTime = 0.1] the amount of smoothing applied to the
|
|
* incoming signal
|
|
*/
|
|
Tone.Gate = function(thresh, smoothTime){
|
|
Tone.call(this);
|
|
|
|
//default values
|
|
thresh = this.defaultArg(thresh, -40);
|
|
smoothTime = this.defaultArg(smoothTime, 0.1);
|
|
|
|
/**
|
|
* @type {Tone.Follower}
|
|
* @private
|
|
*/
|
|
this._follower = new Tone.Follower(smoothTime);
|
|
|
|
/**
|
|
* @type {Tone.GreaterThan}
|
|
* @private
|
|
*/
|
|
this._gt = new Tone.GreaterThan(this.dbToGain(thresh));
|
|
|
|
//the connections
|
|
this.chain(this.input, this.output);
|
|
//the control signal
|
|
this.chain(this.input, this._follower, this._gt, this.output.gain);
|
|
};
|
|
|
|
Tone.extend(Tone.Gate);
|
|
|
|
/**
|
|
* set the gating threshold
|
|
* @param {number} thresh the gating threshold
|
|
*/
|
|
Tone.Gate.prototype.setThreshold = function(thresh){
|
|
this._gt.setValue(this.dbToGain(thresh));
|
|
};
|
|
|
|
/**
|
|
* set the amount of smoothing applied to the incoming signal
|
|
* @param {Tone.Time} smoothTime
|
|
*/
|
|
Tone.Gate.prototype.setSmoothTime = function(smoothTime){
|
|
this._follower.setSmoothTime(smoothTime);
|
|
};
|
|
|
|
/**
|
|
* dispose
|
|
*/
|
|
Tone.Gate.prototype.dispose = function(){
|
|
Tone.prototype.dispose.call(this);
|
|
this._follower.dispose();
|
|
this._gt.dispose();
|
|
this._follower = null;
|
|
this._gt = null;
|
|
};
|
|
|
|
return Tone.Gate;
|
|
}); |