tone
Version:
A Web Audio framework for making interactive music in the browser.
49 lines • 2 kB
JavaScript
import { StereoEffect } from "./StereoEffect.js";
import { Signal } from "../signal/Signal.js";
import { Gain } from "../core/context/Gain.js";
import { readOnly } from "../core/util/Interface.js";
import { Split } from "../component/channel/Split.js";
import { Merge } from "../component/channel/Merge.js";
/**
* Base class for stereo feedback effects where the effectReturn is fed back into the same channel.
*/
export class StereoFeedbackEffect extends StereoEffect {
constructor(options) {
super(options);
this.feedback = new Signal({
context: this.context,
value: options.feedback,
units: "normalRange",
});
this._feedbackL = new Gain({ context: this.context });
this._feedbackR = new Gain({ context: this.context });
this._feedbackSplit = new Split({ context: this.context, channels: 2 });
this._feedbackMerge = new Merge({ context: this.context, channels: 2 });
this._merge.connect(this._feedbackSplit);
this._feedbackMerge.connect(this._split);
// the left output connected to the left input
this._feedbackSplit.connect(this._feedbackL, 0, 0);
this._feedbackL.connect(this._feedbackMerge, 0, 0);
// the right output connected to the right input
this._feedbackSplit.connect(this._feedbackR, 1, 0);
this._feedbackR.connect(this._feedbackMerge, 0, 1);
// the feedback control
this.feedback.fan(this._feedbackL.gain, this._feedbackR.gain);
readOnly(this, ["feedback"]);
}
static getDefaults() {
return Object.assign(StereoEffect.getDefaults(), {
feedback: 0.5,
});
}
dispose() {
super.dispose();
this.feedback.dispose();
this._feedbackL.dispose();
this._feedbackR.dispose();
this._feedbackSplit.dispose();
this._feedbackMerge.dispose();
return this;
}
}
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