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Give tremolo a stereo spread option

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Luke Phillips 2015-12-06 13:29:08 +13:00
parent 8231fc5cf3
commit 1cbe390d8d
2 changed files with 26 additions and 9 deletions
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Tone/effect/Tremolo.js
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@ -3,12 +3,12 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
"use strict";
/**
* @class Tone.Tremolo modulates the amplitude of an incoming signal using a Tone.LFO.
* The type, frequency, and depth of the LFO is controllable.
* @class Tone.Tremolo modulates the amplitude of an incoming signal using a Tone.LFO.
* The type, frequency, and depth of the LFO is controllable.
*
* @extends {Tone.StereoEffect}
* @constructor
* @param {Frequency|Object} [frequency] The rate of the effect.
* @param {Frequency|Object} [frequency] The rate of the effect.
* @param {NormalRange} [depth] The depth of the wavering.
* @example
* //create a tremolo and start it's LFO
@ -27,7 +27,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
* @private
*/
this._lfoL = new Tone.LFO({
"phase" : 0,
"phase" : options.spread,
"min" : 1,
"max" : 0,
});
@ -38,7 +38,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
* @private
*/
this._lfoR = new Tone.LFO({
"phase" : 180,
"phase" : options.spread,
"min" : 1,
"max" : 0,
});
@ -58,7 +58,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
this._amplitudeR = new Tone.Gain();
/**
* The frequency of the tremolo.
* The frequency of the tremolo.
* @type {Frequency}
* @signal
*/
@ -67,7 +67,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
/**
* The depth of the effect. A depth of 0, has no effect
* on the amplitude, and a depth of 1 makes the amplitude
* modulate fully between 0 and 1.
* modulate fully between 0 and 1.
* @type {NormalRange}
* @signal
*/
@ -93,7 +93,8 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
Tone.Tremolo.defaults = {
"frequency" : 10,
"type" : "sine",
"depth" : 0.5
"depth" : 0.5,
"spread" : 180,
};
/**
@ -121,7 +122,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
/**
* Sync the effect to the transport.
* @param {Time} [delay=0] Delay time before starting the effect after the
* Transport has started.
* Transport has started.
* @returns {Tone.AutoFilter} this
*/
Tone.Tremolo.prototype.sync = function(delay){
@ -156,6 +157,22 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect"], fun
}
});
/** Amount of stereo spread. When set to 0, both LFO's will be panned centrally.
* When set to 180, LFO's will be panned hard left and right respectively.
* @memberOf Tone.Tremolo#
* @type {number}
* @name spread
*/
Object.defineProperty(Tone.Tremolo.prototype, "spread", {
get : function(){
return this._lfoR.phase - this._lfoL.phase; //180
},
set : function(spread){
this._lfoL.phase = 90 - (spread/2);
this._lfoR.phase = (spread/2) + 90;
}
});
/**
* clean up
* @returns {Tone.Tremolo} this