tone
Version:
A Web Audio framework for making interactive music in the browser.
51 lines • 1.93 kB
JavaScript
import { ToneAudioNode, } from "../../core/context/ToneAudioNode.js";
import { Split } from "./Split.js";
import { Add } from "../../signal/Add.js";
import { Multiply } from "../../signal/Multiply.js";
import { Subtract } from "../../signal/Subtract.js";
import { optionsFromArguments } from "../../core/util/Defaults.js";
/**
* Mid/Side processing separates the the 'mid' signal (which comes out of both the left and the right channel)
* and the 'side' (which only comes out of the the side channels).
* ```
* Mid = (Left+Right)/sqrt(2); // obtain mid-signal from left and right
* Side = (Left-Right)/sqrt(2); // obtain side-signal from left and right
* ```
* @category Component
*/
export class MidSideSplit extends ToneAudioNode {
constructor() {
super(optionsFromArguments(MidSideSplit.getDefaults(), arguments));
this.name = "MidSideSplit";
this._split = this.input = new Split({
channels: 2,
context: this.context,
});
this._midAdd = new Add({ context: this.context });
this.mid = new Multiply({
context: this.context,
value: Math.SQRT1_2,
});
this._sideSubtract = new Subtract({ context: this.context });
this.side = new Multiply({
context: this.context,
value: Math.SQRT1_2,
});
this._split.connect(this._midAdd, 0);
this._split.connect(this._midAdd.addend, 1);
this._split.connect(this._sideSubtract, 0);
this._split.connect(this._sideSubtract.subtrahend, 1);
this._midAdd.connect(this.mid);
this._sideSubtract.connect(this.side);
}
dispose() {
super.dispose();
this.mid.dispose();
this.side.dispose();
this._midAdd.dispose();
this._sideSubtract.dispose();
this._split.dispose();
return this;
}
}
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