| 1 | import { connectSeries } from "../core/context/ToneAudioNode.js";
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| 2 | import { Gain } from "../core/context/Gain.js";
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| 3 | import { optionsFromArguments } from "../core/util/Defaults.js";
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| 4 | import { Negate } from "../signal/Negate.js";
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| 5 | import { Signal } from "../signal/Signal.js";
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| 6 | /**
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| 7 | * Subtract the signal connected to the input is subtracted from the signal connected
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| 8 | * The subtrahend.
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| 9 | *
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| 10 | * @example
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| 11 | * // subtract a scalar from a signal
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| 12 | * const sub = new Tone.Subtract(1);
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| 13 | * const sig = new Tone.Signal(4).connect(sub);
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| 14 | * // the output of sub is 3.
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| 15 | * @example
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| 16 | * // subtract two signals
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| 17 | * const sub = new Tone.Subtract();
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| 18 | * const sigA = new Tone.Signal(10);
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| 19 | * const sigB = new Tone.Signal(2.5);
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| 20 | * sigA.connect(sub);
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| 21 | * sigB.connect(sub.subtrahend);
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| 22 | * // output of sub is 7.5
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| 23 | * @category Signal
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| 24 | */
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| 25 | export class Subtract extends Signal {
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| 26 | constructor() {
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| 27 | super(optionsFromArguments(Subtract.getDefaults(), arguments, ["value"]));
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| 28 | this.override = false;
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| 29 | this.name = "Subtract";
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| 30 | /**
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| 31 | * the summing node
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| 32 | */
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| 33 | this._sum = new Gain({ context: this.context });
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| 34 | this.input = this._sum;
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| 35 | this.output = this._sum;
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| 36 | /**
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| 37 | * Negate the input of the second input before connecting it to the summing node.
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| 38 | */
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| 39 | this._neg = new Negate({ context: this.context });
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| 40 | /**
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| 41 | * The value which is subtracted from the main signal
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| 42 | */
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| 43 | this.subtrahend = this._param;
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| 44 | connectSeries(this._constantSource, this._neg, this._sum);
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| 45 | }
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| 46 | static getDefaults() {
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| 47 | return Object.assign(Signal.getDefaults(), {
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| 48 | value: 0,
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| 49 | });
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| 50 | }
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| 51 | dispose() {
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| 52 | super.dispose();
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| 53 | this._neg.dispose();
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| 54 | this._sum.dispose();
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| 55 | return this;
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| 56 | }
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| 57 | }
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| 58 | //# sourceMappingURL=Subtract.js.map |
| \ | No newline at end of file |