mirror of
https://github.com/Tonejs/Tone.js
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111 lines
2.7 KiB
JavaScript
111 lines
2.7 KiB
JavaScript
import Tone from "../../core/Tone";
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import "../../signal/Signal";
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import "../../signal/Subtract";
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import "../../signal/Add";
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import "../component/Merge";
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import "../core/Gain";
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import "../core/AudioNode";
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/**
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* @class Mid/Side processing separates the the 'mid' signal
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* (which comes out of both the left and the right channel)
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* and the 'side' (which only comes out of the the side channels).
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* MidSideMerge merges the mid and side signal after they've been seperated
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* by Tone.MidSideSplit.<br><br>
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* <code>
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* Left = (Mid+Side)/sqrt(2); // obtain left signal from mid and side<br>
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* Right = (Mid-Side)/sqrt(2); // obtain right signal from mid and side<br>
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* </code>
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*
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* @extends {Tone.AudioNode}
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* @constructor
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*/
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Tone.MidSideMerge = function(){
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Tone.AudioNode.call(this);
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this.createInsOuts(2, 0);
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/**
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* The mid signal input. Alias for
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* <code>input[0]</code>
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* @type {Tone.Gain}
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*/
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this.mid = this.input[0] = new Tone.Gain();
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/**
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* recombine the mid/side into Left
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* @type {Tone.Add}
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* @private
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*/
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this._left = new Tone.Add();
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/**
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* Multiply the left by sqrt(1/2)
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* @type {Tone.Multiply}
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*/
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this._timesTwoLeft = new Tone.Multiply(Math.SQRT1_2);
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/**
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* The side signal input. Alias for
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* <code>input[1]</code>
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* @type {Tone.Gain}
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*/
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this.side = this.input[1] = new Tone.Gain();
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/**
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* recombine the mid/side into Right
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* @type {Tone.Subtract}
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* @private
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*/
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this._right = new Tone.Subtract(/*"($0 - $1) * $2"*/);
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/**
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* Multiply the right by sqrt(1/2)
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* @type {Tone.Multiply}
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*/
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this._timesTwoRight = new Tone.Multiply(Math.SQRT1_2);
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/**
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* Merge the left/right signal back into a stereo signal.
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* @type {Tone.Merge}
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* @private
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*/
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this._merge = this.output = new Tone.Merge();
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this.mid.connect(this._left, 0, 0);
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this.side.connect(this._left, 0, 1);
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this.mid.connect(this._right, 0, 0);
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this.side.connect(this._right, 0, 1);
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this._left.connect(this._timesTwoLeft);
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this._right.connect(this._timesTwoRight);
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this._timesTwoLeft.connect(this._merge, 0, 0);
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this._timesTwoRight.connect(this._merge, 0, 1);
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};
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Tone.extend(Tone.MidSideMerge, Tone.AudioNode);
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/**
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* clean up
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* @returns {Tone.MidSideMerge} this
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*/
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Tone.MidSideMerge.prototype.dispose = function(){
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Tone.AudioNode.prototype.dispose.call(this);
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this.mid.dispose();
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this.mid = null;
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this.side.dispose();
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this.side = null;
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this._left.dispose();
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this._left = null;
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this._timesTwoLeft.dispose();
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this._timesTwoLeft = null;
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this._right.dispose();
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this._right = null;
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this._timesTwoRight.dispose();
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this._timesTwoRight = null;
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this._merge.dispose();
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this._merge = null;
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return this;
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};
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export default Tone.MidSideMerge;
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