Piano synth · gemma-4-31b-it
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.
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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
The objective is to create a single-page web app (`index.html`) that is a playable piano keyboard.
- It must use `tone.min.js` (already present in the current directory).
- Controls: Mouse and computer keys.
- Sound: Synthesizes notes with an ADSR envelope.
- Visuals: Key feedback (visual change when pressed).
- Constraints: All-in-one file (`index.html`), no external resources/CDNs, no network requests.
Plan:
1. Check if `tone.min.js` exists in the directory.
2. Design the HTML structure: A container for the keyboard.
3. Design the CSS: Styling for white and black keys, active states.
4. Implement the JavaScript:
- Initialize Tone.js Synth with ADSR envelope.
- Map computer keys to musical notes.
- Handle mouse events for clicking keys.
- Handle keyboard events for playing notes.
- Manage Tone.js audio context (user interaction requirement).
- Visual feedback logic.
Mapping for keys:
A common piano layout for computer keys (e.g., ASDF for white keys, W E T Y U for black keys).
Let's use a standard mapping:
White keys: A, S, D, F, G, H, J, K, L, ; (or similar)
Black keys: W, E, T, Y, U, O, P
Wait, Tone.js is a powerful library. I should use `Tone.Synth` and configure its `envelope`.
Let's start by verifying the file.{"command":"ls tone.min.js"}tone.min.js
thinking
The file exists. Now I will create `index.html`.
I'll use the following layout:
White keys: C, D, E, F, G, A, B, C, D, E, F, G, A, B, C (roughly 2 octaves)
Mapping:
C: 'a'
D: 's'
E: 'd'
F: 'f'
G: 'g'
A: 'h'
B: 'j'
C: 'k'
D: 'l'
E: ';'
... actually let's do a standard mapping:
C4: a
C#4: w
D4: s
D#4: e
E4: d
F4: f
F#4: t
G4: g
G#4: y
A4: h
A#4: u
B4: j
C5: k
C#5: o
D5: l
D#5: p
E5: ;
Let's refine the mapping to be more intuitive.
White keys: A, S, D, F, G, H, J, K, L, ;
Black keys: W, E, T, Y, U, O, P
C4 (A), C#4 (W), D4 (S), D#4 (E), E4 (D), F4 (F), F#4 (T), G4 (G), G#4 (Y), A4 (H), A#4 (U), B4 (J), C5 (K), C#5 (O), D5 (L), D#5 (P), E5 (;)
Wait, the user wants ADSR envelope. `Tone.Synth` has an `envelope` property.
```javascript
const synth = new Tone.Synth({
oscillator: { type: "triangle" },
envelope: {
attack: 0.05,
decay: 0.1,
sustain: 0.3,
release: 1
}
}).toDestination();
```
I need to make sure I handle the "start audio" restriction in browsers.
Let's write the code.{"content":"<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-wiValidation failed for tool "write": - path: must have required properties path Received arguments: { "content": "<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>JS Piano Synth</title>\n <style>\n body {\n margin: 0;\n padding: 0;\n display: flex;\n flex-direction: column;\n align-items: center;\n justify-content: center;\n height: 100vh;\n background-color: #222;\n color: white;\n font-family: sans-serif;\n user-select: none;\n }\n\n .header {\n margin-bottom: 20px;\n text-align: center;\n }\n\n .piano-container {\n position: relative;\n display: flex;\n background: #000;\n padding: 10px;\n border-radius: 8px;\n box-shadow: 0 10px 30px rgba(0,0,0,0.5);\n }\n\n .key {\n cursor: pointer;\n position: relative;\n transition: background-color 0.1s, transform 0.05s;\n }\n\n .white-key {\n width: 60px;\n height: 200px;\n background: white;\n border: 1px solid #ccc;\n border-radius: 0 0 5px 5px;\n z-index: 1;\n }\n\n .white-key.active {\n background: #ddd;\n transform: translateY(2px);\n }\n\n .black-key {\n width: 40px;\n height: 120px;\n background: #333;\n border-radius: 0 0 5px 5px;\n margin-left: -20px;\n margin-right: -20px;\n z-index: 2;\n color: white;\n font-size: 10px;\n display: flex;\n align-items: flex-end;\n justify-content: center;\n padding-bottom: 10px;\n }\n\n .black-key.active {\n background: #555;\n transform: translateY(2px);\n }\n\n .key-label {\n position: absolute;\n bottom: 10px;\n left: 0;\n right: 0;\n text-align: center;\n color: #888;\n font-size: 12px;\n pointer-events: none;\n }\n\n .black-key .key-label {\n color: #eee;\n bottom: 5px;\n }\n\n #start-overlay {\n position: fixed;\n top: 0; left: 0; right: 0; bottom: 0;\n background: rgba(0,0,0,0.8);\n display: flex;\n align-items: center;\n justify-content: center;\n z-index: 100;\n cursor: pointer;\n }\n\n .overlay-text {\n font-size: 24px;\n padding: 20px 40px;\n border: 2px solid white;\n border-radius: 10px;\n transition: background 0.3s;\n }\n\n .overlay-text:hover {\n background: white;\n color: black;\n }\n </style>\n</head>\n<body>\n\n <div id=\"start-overlay\">\n <div class=\"overlay-text\">Click to Start Piano</div>\n </div>\n\n <div class=\"header\">\n <h1>ADSR Piano Synth</h1>\n <p>Use your mouse or keyboard: A S D F G H J K L ; (White) and W E T Y U O P (Black)</p>\n </div>\n\n <div class=\"piano-container\" id=\"piano\">\n <!-- Keys will be generated by JS -->\n </div>\n\n <script src=\"tone.min.js\"></script>\n <script>\n const KEY_MAP = [\n { note: 'C4', key: 'a', type: 'white' },\n { note: 'C#4', key: 'w', type: 'black' },\n { note: 'D4', key: 's', type: 'white' },\n { note: 'D#4', key: 'e', type: 'black' },\n { note: 'E4', key: 'd', type: 'white' },\n { note: 'F4', key: 'f', type: 'white' },\n { note: 'F#4', key: 't', type: 'black' },\n { note: 'G4', key: 'g', type: 'white' },\n { note: 'G#4', key: 'y', type: 'black' },\n { note: 'A4', key: 'h', type: 'white' },\n { note: 'A#4', key: 'u', type: 'black' },\n { note: 'B4', key: 'j', type: 'white' },\n { note: 'C5', key: 'k', type: 'white' },\n { note: 'C#5', key: 'o', type: 'black' },\n { note: 'D5', key: 'l', type: 'white' },\n { note: 'D#5', key: 'p', type: 'black' },\n { note: 'E5', key: ';', type: 'white' },\n ];\n\n let synth;\n const activeNotes = new Map();\n\n function initAudio() {\n // Initialize Tone.Synth with ADSR envelope\n synth = new Tone.PolySynth(Tone.Synth, {\n oscillator: {\n type: 'triangle'\n },\n envelope: {\n attack: 0.05,\n decay: 0.1,\n sustain: 0.3,\n release: 1\n }\n }).toDestination();\n \n document.getElementById('start-overlay').style.display = 'none';\n }\n\n function playNote(note) {\n if (!synth) return;\n synth.triggerAttack(note);\n const el = document.querySelector(`[data-note=\"${note}\"]`);\n if (el) el.classList.add('active');\n activeNotes.set(note, true);\n }\n\n function stopNote(note) {\n if (!synth) return;\n synth.triggerRelease(note);\n const el = document.querySelector(`[data-note=\"${note}\"]`);\n if (el) el.classList.remove('active');\n activeNotes.delete(note);\n }\n\n function createPiano() {\n const piano = document.getElementById('piano');\n KEY_MAP.forEach(item => {\n const keyDiv = document.createElement('div');\n keyDiv.className = `key ${item.type}-key`;\n keyDiv.dataset.note = item.note;\n \n const label = document.createElement('div');\n label.className = 'key-label';\n label.textContent = item.key.toUpperCase();\n keyDiv.appendChild(label);\n\n keyDiv.onmousedown = () => playNote(item.note);\n keyDiv.onmouseup = () => stopNote(item.note);\n keyDiv.onmouseleave = () => {\n if (activeNotes.has(item.note)) stopNote(item.note);\n };\n\n piano.appendChild(keyDiv);\n });\n }\n\n window.addEventListener('keydown', (e) => {\n const key = e.key.toLowerCase();\n const mapping = KEY_MAP.find(m => m.key === key);\n if (mapping && !activeNotes.has(mapping.note)) {\n playNote(mapping.note);\n }\n });\n\n window.addEventListener('keyup', (e) => {\n const key = e.key.toLowerCase();\n const mapping = KEY_MAP.find(m => m.key === key);\n if (mapping) {\n stopNote(mapping.note);\n }\n });\n\n document.getElementById('start-overlay').onclick = () => {\n Tone.start().then(() => {\n initAudio();\n });\n };\n\n createPiano();\n </script>\n</body>\n</html>\n" }
TAKE IT TO CODE
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