1 files changed, 66 insertions, 0 deletions
diff --git a/player.mjs b/player.mjs
new file mode 100644
index 0000000..55ce64f
--- /dev/null
+++ b/player.mjs
@@ -0,0 +1,66 @@
+import { Note, toCents } from './scale.mjs';
+import GuitarFuzz from './vend/guitar-fuzz.mjs';
+import Trombone from './vend/trombone.mjs';
+
+const audioCtx = new AudioContext();
+const fuzzWave = new PeriodicWave(audioCtx, {
+    real: GuitarFuzz.real,
+    imag: GuitarFuzz.imag
+});
+const tromboneWave = new PeriodicWave(audioCtx, {
+    real: Trombone.real,
+    imag: Trombone.imag
+});
+
+const globalGain = new GainNode(audioCtx, { gain: 0.06 })
+
+export default class {
+    // oscillatornodes
+    notes = [];
+
+    // offsets is an array of offsets in cents from A4.
+    constructor(offsets) {
+        console.debug('Player#constructor', this, offsets);
+        this.offsets = offsets;
+
+        this.notes = offsets.map(o =>
+            new OscillatorNode(audioCtx, {
+                frequency: 440, // a above middle c (c4)
+                detune: o,
+                //                type: 'sine',
+                type: 'custom',
+                periodicWave: tromboneWave,
+            }));
+
+        this.notes.forEach(n => n.connect(globalGain).connect(audioCtx.destination));
+    }
+
+    start() {
+        console.debug('Player#start', this);
+        this.notes.forEach(n => n.start());
+    }
+
+    stop() {
+        console.debug('Player#stop', this);
+        this.notes.forEach(n => n.stop());
+    }
+
+    test() {
+        const cNote = Note.fromString('C');
+        console.assert(cNote.distanceTo(cNote) === 0);
+        const dNote = Note.fromString('D');
+        console.assert(cNote.distanceTo(dNote) === 2);
+        const dSharpNote = Note.fromString('D♯');
+        console.assert(cNote.distanceTo(dSharpNote) === 3);
+
+        const aNote = Note.fromString('A', 'A to A');
+        console.assert(toCents([aNote, 4], [aNote, 3]) === -1200);
+        const bNote = Note.fromString('B');
+        console.assert(toCents([aNote, 4], [bNote, 4]) == 200, 'A4 to B4 is 200 cents');
+        // E F F# G G# A
+        const eNote = Note.fromString('E');
+        console.assert(toCents([aNote, 4], [eNote, 4]) === -500, 'E4 is 500 cents lower than A4');
+
+        console.assert(toCents([aNote, 4], [bNote, 3]) === -1000, 'A4 to B3 is 100 cents above -1200');
+    }
+}