synth setup with tone.js

src/lib/audio/synth.ts

@@ -0,0 +1,47 @@
+import * as Tone from "tone";
+
+export type SynthNodes = {
+    oscillatorA: Tone.Oscillator;
+    oscillatorB: Tone.Oscillator;
+    crossFade: Tone.CrossFade;
+    noise: Tone.Noise;
+    gain: Tone.Gain;
+};
+
+export function createSynth(): SynthNodes {
+    const oscillatorA = new Tone.Oscillator({ type: "sawtooth" });
+    const oscillatorB = new Tone.Oscillator({ type: "sine" });
+    const crossFade = new Tone.CrossFade(0);
+    const noise = new Tone.Noise({ type: "white" });
+    const gain = new Tone.Gain(0.5);
+
+    oscillatorA.connect(crossFade.a);
+    oscillatorB.connect(crossFade.b);
+    crossFade.connect(gain);
+    noise.connect(gain);
+    gain.toDestination();
+
+    oscillatorA.start();
+    oscillatorB.start();
+    noise.start();
+
+    return {
+        oscillatorA,
+        oscillatorB,
+        crossFade,
+        noise,
+        gain,
+    };
+}
+
+export function disposeSynth(nodes: SynthNodes) {
+    nodes.oscillatorA.stop();
+    nodes.oscillatorB.stop();
+    nodes.noise.stop();
+
+    nodes.oscillatorA.dispose();
+    nodes.oscillatorB.dispose();
+    nodes.crossFade.dispose();
+    nodes.noise.dispose();
+    nodes.gain.dispose();
+}