Piano synth · seed-2.0-code
Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.
transcript · 12 messages
Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.
thinking
Let me create a playable piano keyboard using Tone.js. I need to: 1. Create an HTML file with a piano keyboard UI 2. Use Tone.js for synthesis with ADSR envelope 3. Handle both mouse and keyboard inputs 4. Add visual feedback for pressed keys 5. Include everything in a single index.html file Let me first check if tone.min.js exists in the current directory.
{"command":"ls -la"}total 344 drwxr-sr-x. 2 node node 25 Aug 13 01:30 . drwxrwsrwx. 3 root node 16 Aug 13 01:30 .. -rw-r--r--. 1 node node 349169 Aug 13 01:30 tone.min.js
thinking
Great, tone.min.js is present. Now I'll create the index.html file with: 1. A piano keyboard UI with white and black keys 2. Tone.js synth with ADSR envelope 3. Mouse and keyboard event handling 4. Visual feedback for pressed keys
/tmp/ws/index.html (20664 bytes)Successfully wrote 20664 bytes to /tmp/ws/index.html
thinking
The index.html file has been created with a playable piano keyboard that uses Tone.js. Let me verify that everything is in place and that the file is complete. The piano includes: 1. Visual piano keys (white and black) 2. Mouse and keyboard control 3. ADSR envelope controls (Attack, Decay, Sustain, Release) 4. Waveform selection (Sine, Square, Sawtooth, Triangle) 5. Octave control 6. Visual feedback for pressed keys 7. Reverb effect for nicer sound Let me check the file once more to make sure it's all complete.
{"command":"ls -la"}total 368 drwxr-sr-x. 2 node node 43 Aug 13 01:31 . drwxrwsrwx. 3 root node 16 Aug 13 01:30 .. -rw-r--r--. 1 node node 20668 Aug 13 01:31 index.html -rw-r--r--. 1 node node 349169 Aug 13 01:30 tone.min.js
thinking
The index.html file has been created successfully. Let me verify the contents are correct by checking the first few lines and then confirming everything is in order.
{"path":"/tmp/ws/index.html","limit":50}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Playable Synth Piano</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px; } h1 { color: #eee; margin-bottom: 10px; text-shadow: 0 0 20px rgba(79, 172, 254, 0.5); font-size: 2.5rem; } .subtitle { color: #8892b0; margin-bottom: 30px; font-size: 1rem; } .controls { background: rgba(255, 255, 255, 0.05); border-radius: 12px; padding: 20px 30px; margin-bottom: 30px; display: flex; gap: 30px; flex-wrap: wrap; justify-content: center; backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.1); } [577 more lines in file. Use offset=51 to continue.]
thinking
The file looks good and is complete. Let me just verify the script section at the end to make sure all the functionality is there.
{"path":"/tmp/ws/index.html","offset":500}function stopNote(note) { if (!synth || !activeNotes[note]) return; const el = document.querySelector(`[data-note="${note}"]`); if (el) { el.classList.remove('pressed'); } const adjustedNote = adjustOctave(note); synth.triggerRelease(adjustedNote); delete activeNotes[note]; } function adjustOctave(note) { if (octaveOffset === 0) return note; const match = note.match(/^([CDEFGAB]#?)(\d)$/); if (!match) return note; const noteName = match[1]; let octave = parseInt(match[2]); octave = Math.max(1, Math.min(7, octave + octaveOffset)); return noteName + octave; } function updateOctaveDisplay() { const display = document.getElementById('octaveDisplay'); const baseOctave = 4 + octaveOffset; display.textContent = `C${baseOctave}`; } // Keyboard event handlers function handleKeyDown(e) { if (e.repeat) return; const key = e.key.toLowerCase(); const mapping = keyMap[key]; if (mapping) { const fullNote = mapping.note + mapping.octave; playNote(fullNote); } } function handleKeyUp(e) { const key = e.key.toLowerCase(); const mapping = keyMap[key]; if (mapping) { const fullNote = mapping.note + mapping.octave; stopNote(fullNote); } } // Initialize document.addEventListener('DOMContentLoaded', () => { createPiano(); const startBtn = document.getElementById('startBtn'); const controls = document.getElementById('controls'); const keyboardHint = document.getElementById('keyboardHint'); startBtn.addEventListener('click', async () => { await Tone.start(); initSynth(); startBtn.classList.add('hidden'); controls.style.display = 'flex'; keyboardHint.style.display = 'block'; document.addEventListener('keydown', handleKeyDown); document.addEventListener('keyup', handleKeyUp); }); // Waveform control document.getElementById('waveform').addEventListener('change', (e) => { if (synth) { synth.set({ oscillator: { type: e.target.value } }); } }); // ADSR controls const adsrControls = [ { id: 'attack', valId: 'attackVal', suffix: 's' }, { id: 'decay', valId: 'decayVal', suffix: 's' }, { id: 'sustain', valId: 'sustainVal', suffix: '' }, { id: 'release', valId: 'releaseVal', suffix: 's' } ]; adsrControls.forEach(ctrl => { const input = document.getElementById(ctrl.id); const valDisplay = document.getElementById(ctrl.valId); input.addEventListener('input', (e) => { const value = parseFloat(e.target.value); valDisplay.textContent = value + ctrl.suffix; if (synth) { const update = {}; update.envelope = {}; update.envelope[ctrl.id] = value; synth.set(update); } }); }); // Octave controls document.getElementById('octaveUp').addEventListener('click', () => { if (octaveOffset < 2) { octaveOffset++; updateOctaveDisplay(); } }); document.getElementById('octaveDown').addEventListener('click', () => { if (octaveOffset > -2) { octaveOffset--; updateOctaveDisplay(); } }); }); </script> </body> </html>
thinking
Perfect! The index.html file is complete and includes all the required functionality: 1. **Visual Piano Keyboard**: White and black keys with labels and keyboard hints 2. **Mouse & Touch Support**: Click/hover/leave events for mouse, touch events for mobile 3. **Computer Keyboard Control**: Maps keyboard keys to piano notes (A-W-S-E-D-F-T-G-Y-H-U-J for main octave, etc.) 4. **ADSR Envelope**: Attack, Decay, Sustain, Release controls with real-time adjustment 5. **Waveform Selection**: Sine, Square, Sawtooth, Triangle waveforms 6. **Octave Control**: Up/down octave shifting (range: -2 to +2) 7. **Visual Feedback**: Keys light up when pressed (blue highlight) 8. **Reverb Effect**: Added reverb for a nicer sound 9. **Polyphonic Synth**: Can play multiple notes at once The application is self-contained in a single index.html file with embedded CSS and JavaScript, and it loads tone.min.js locally (no CDNs or external resources). I'll mark this as complete since all requirements have been met.
I've created a complete playable synth piano application using the pre-provided tone.min.js library. The application includes: ## Features 1. **Visual Piano Keyboard**: Interactive white and black keys with note labels 2. **Dual Input Support**: - Mouse/touch: Click or tap keys to play - Computer keyboard: Use keys like A-W-S-E-D-F-T-G-Y-H-U-J for notes 3. **ADSR Envelope Controls**: Real-time adjustment of Attack, Decay, Sustain, and Release 4. **Waveform Selection**: Choose from Sine, Square, Sawtooth, or Triangle waveforms 5. **Octave Shifting**: Shift pitch up/down by octaves (range: -2 to +2) 6. **Visual Feedback**: Keys highlight in blue when pressed 7. **Reverb Effect**: Added reverb for a richer sound 8. **Polyphonic**: Play multiple notes simultaneously ## Files Created - **index.html** (20KB) - Self-contained application with embedded CSS and JavaScript The application loads tone.min.js locally from the current directory (no external CDNs or network requests). To use it, simply open index.html in a web browser, click "Click to Start Audio" to initialize the Tone.js context, then start playing!
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Piano UI renders with key labels; click and enter/space highlight E4 key but arrows/wasd/drag/wheel show no visible change.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.