tone/Tone/instrument/DuoSynth.test.ts

A Web Audio framework for making interactive music in the browser.

import { BasicTests } from "../../test/helper/Basic.js";
import { InstrumentTest } from "../../test/helper/InstrumentTests.js";
import { DuoSynth } from "./DuoSynth.js";
import { CompareToFile } from "../../test/helper/CompareToFile.js";
import { expect } from "chai";
import { MonophonicTest } from "../../test/helper/MonophonicTests.js";

describe("DuoSynth", () => {
	BasicTests(DuoSynth);
	MonophonicTest(DuoSynth, "C4");
	InstrumentTest(DuoSynth, "C4", {
		voice0: {
			oscillator: {
				type: "square",
			},
			envelope: {
				decay: 0.1,
				sustain: 0.5,
				release: 0.2,
			},
		},
		voice1: {
			oscillator: {
				type: "square",
			},
			envelope: {
				decay: 0.1,
				sustain: 0.5,
				release: 0.3,
			},
		},
	});

	it("matches a file", () => {
		return CompareToFile(
			() => {
				const synth = new DuoSynth().toDestination();
				synth.triggerAttackRelease("C5", 0.1, 0.1);
			},
			"duoSynth.wav",
			0.07
		);
	});

	context("API", () => {
		it("can get and set voice0 attributes", () => {
			const duoSynth = new DuoSynth();
			duoSynth.voice0.oscillator.type = "triangle";
			expect(duoSynth.voice0.oscillator.type).to.equal("triangle");
			duoSynth.dispose();
		});

		it("can get and set voice1 attributes", () => {
			const duoSynth = new DuoSynth();
			duoSynth.voice1.envelope.attack = 0.24;
			expect(duoSynth.voice1.envelope.attack).to.equal(0.24);
			duoSynth.dispose();
		});

		it("can get and set harmonicity", () => {
			const duoSynth = new DuoSynth();
			duoSynth.harmonicity.value = 2;
			expect(duoSynth.harmonicity.value).to.equal(2);
			duoSynth.dispose();
		});

		it("can get and set vibratoRate", () => {
			const duoSynth = new DuoSynth();
			duoSynth.vibratoRate.value = 2;
			expect(duoSynth.vibratoRate.value).to.equal(2);
			duoSynth.dispose();
		});

		it("can be constructed with an options object", () => {
			const duoSynth = new DuoSynth({
				voice0: {
					filter: {
						rolloff: -24,
					},
				},
			});
			expect(duoSynth.voice0.filter.rolloff).to.equal(-24);
			duoSynth.dispose();
		});

		it("can get/set attributes", () => {
			const duoSynth = new DuoSynth();
			duoSynth.set({
				harmonicity: 1.5,
			});
			expect(duoSynth.get().harmonicity).to.equal(1.5);
			duoSynth.dispose();
		});
	});
});