initEventListeners() document.getElementById('midiFileInput').addEventListener('change', (e) => this.loadMIDI(e)); document.getElementById('playBtn').addEventListener('click', () => this.play()); document.getElementById('pauseBtn').addEventListener('click', () => this.pause()); document.getElementById('stopBtn').addEventListener('click', () => this.stop());
.lyrics background: rgba(0,0,0,0.7); color: #ffd700; padding: 15px; border-radius: 15px; text-align: center; font-size: 20px; font-weight: bold; margin-top: 15px; font-family: monospace; midi clef karaoke player
midiToStaffY(midiNote) // Middle C (MIDI 60) position depends on clef const staffTop = 50; const lineSpacing = 25; let linesFromC; if (this.clef === 'treble') // In treble clef, middle C is below the staff (1 ledger line) // E4 (MIDI 64) is bottom line linesFromC = midiNote - 60; // each step = half line const y = staffTop + (4 * lineSpacing) - (linesFromC * lineSpacing / 2); return y; else // Bass clef: middle C is above staff // C3 (MIDI 48) is top line? Let's adjust const bassRef = 48; // C3 linesFromC = midiNote - bassRef; const y = staffTop + (1 * lineSpacing) - (linesFromC * lineSpacing / 2); return y; initEventListeners() document
playMIDINotes() let currentIndex = 0; const scheduleNotes = () => if (!this.isPlaying) return; const now = (performance.now() - this.startTime) / 1000; while (currentIndex < this.notes.length && this.notes[currentIndex].startTime <= now + 0.1) const note = this.notes[currentIndex]; const midiNote = note.pitch; const velocity = note.velocity / 127; const duration = note.duration; MIDI.noteOn(0, midiNote, velocity, 0); MIDI.noteOff(0, midiNote, duration); currentIndex++; requestAnimationFrame(scheduleNotes); ; scheduleNotes(); .lyrics background: rgba(0