Initial commit

public/constants.ts

@@ -0,0 +1,39 @@
+
+import { Instrument } from './types';
+
+export const INSTRUMENTS: Instrument[] = [
+  { name: 'Kick' },
+  { name: 'Snare' },
+  { name: 'Hi-Hat' },
+  { name: 'Open Hat' },
+  { name: 'Ride' },
+];
+
+export const INITIAL_TEMPO = 76;
+export const INITIAL_STEPS = 16;
+export const MIN_TEMPO = 40;
+export const MAX_TEMPO = 240;
+export const MIN_STEPS = 4;
+export const MAX_STEPS = 64;
+
+// --- BASS CONSTANTS ---
+
+const NOTE_NAMES = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
+
+const getFrequency = (midiNote: number): number => {
+    // A4 (MIDI 69) is 440 Hz
+    return 440 * Math.pow(2, (midiNote - 69) / 12);
+};
+
+export const BASS_NOTES: { name: string; isSharp: boolean }[] = [];
+export const NOTE_FREQ_MAP: { [key: string]: number } = {};
+
+// Generate notes for 2 octaves, starting from C2 (MIDI 36) up to B3
+for (let octave = 2; octave < 4; octave++) {
+    for (let i = 0; i < 12; i++) {
+        const noteName = `${NOTE_NAMES[i]}${octave}`;
+        const midiNote = 36 + (octave - 2) * 12 + i;
+        BASS_NOTES.push({ name: noteName, isSharp: NOTE_NAMES[i].includes('#') });
+        NOTE_FREQ_MAP[noteName] = getFrequency(midiNote);
+    }
+}