Piano synth · deepseek-v3.1-terminus

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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transcript · 41 messages

user

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.

assistant

thinking

I'll start by exploring the current directory to see what files are present, especially tone.min.js. Then I'll create a single-page web app index.html with CSS and JS inline. Let's first check the directory.

→ bash {"command":"ls -la /tmp/ws"}

toolResult

total 344 drwxr-sr-x. 2 node node 25 Aug 1 17:53 . drwxrwsrwx. 3 root node 16 Aug 1 17:53 .. -rw-r--r--. 1 node node 349169 Aug 1 17:53 tone.min.js

assistant

thinking

Great, tone.min.js is there. Let's check its size and maybe a snippet to ensure it's the Tone library. Let's read a small part.

→ read {"path":"/tmp/ws/tone.min.js","limit":5}

toolResult

/*! For license information please see Tone.js.LICENSE.txt */ [Showing lines 1-1 of 3 (50.0KB limit). Use offset=2 to continue.]

assistant

thinking

That's fine. Now I'll create index.html with the following structure:

- HTML5 doctype
- head with meta, title, style tag
- body with a container for piano keyboard (div with keys), maybe some controls for ADSR parameters (attack, decay, sustain, release) using sliders
- script tag loading tone.min.js first, then our own JS code

We need to implement:
- Visual keyboard with white and black keys, using CSS
- Map computer keys to piano notes (maybe two octaves, using keys A-Z, etc.)
- Mouse click on keys to play
- Use Tone.Synth with ADSR envelope
- Visual feedback when key is pressed (change color)

We'll need to handle both mouse down/up and keyboard keydown/keyup.

Let's design the keyboard: maybe 2 octaves (C4 to B5). That's 24 keys (14 white, 10 black). We'll generate them in order.

Let's start by writing the index.html file. We'll write the entire content. First, let's think about CSS.

I'll create the file now.

→ write /tmp/ws/index.html (16794 bytes)

toolResult

Successfully wrote 16794 bytes to /tmp/ws/index.html

assistant

thinking

Now we need to verify that the piano works correctly. However, there's a potential issue: we are calling stopNote on mouseleave, which would cause the note to stop when mouse moves off the key even if still pressed (mouse down). That's typical for piano: you can press and hold, move mouse off, and note should continue until mouse up. We'll need to track mouse state. Also, we should ensure that multiple keys can be played simultaneously (polyphony). Tone.Synth is monophonic by default; we should use PolySynth for polyphony. Let's adjust.

We'll switch to Tone.PolySynth with a monophonic synth as voice. But we can keep simple by using multiple synths or using PolySynth. Let's use PolySynth with a maximum polyphony of 8 or 16. Also need to handle release of specific notes when key up. We'll keep a map of active notes.

Let's update the script. We'll also fix black key positioning to be more accurate. Let's rewrite the script part. We'll edit the file. First, let's read the file to see the exact script section. But easier: we can replace the entire script section with a new one. However, we must be careful not to break the HTML structure. Let's use edit to replace from the start of the script tag to the end. We'll locate the old text and replace with new.

First, let's read the file to get the exact script block. Let's read lines from maybe line 200 to end. Let's use bash to get line numbers. Let's do a quick grep to find the script tag. Let's do:

→ bash {"command":"grep -n \"<script>\" /tmp/ws/index.html"}

toolResult

285: <script>

assistant

thinking

Now we need to know where the script ends. Let's get line number of closing script tag. Let's search from that line to end. Let's do a quick awk but easier: read from line 285 to end and find the closing tag. Let's read a portion.

→ read {"path":"/tmp/ws/index.html","offset":280,"limit":150}

toolResult

Powered by <a href="https://tonejs.github.io/" style="color:#8a2be2;">Tone.js</a> • No external resources • Fully sandboxed </div> </div> <script src="tone.min.js"></script> <script> // Wait for DOM and Tone to be ready document.addEventListener('DOMContentLoaded', () => { // Initialize Tone Tone.start(); // ADSR parameters let attack = 0.05; // seconds let decay = 0.2; let sustain = 0.7; let release = 1.0; // Create synth with ADSR envelope const synth = new Tone.Synth({ oscillator: { type: 'sine' }, envelope: { attack, decay, sustain, release } }).toDestination(); // Update envelope when sliders change const attackSlider = document.getElementById('attack'); const decaySlider = document.getElementById('decay'); const sustainSlider = document.getElementById('sustain'); const releaseSlider = document.getElementById('release'); const attackValue = document.getElementById('attack-value'); const decayValue = document.getElementById('decay-value'); const sustainValue = document.getElementById('sustain-value'); const releaseValue = document.getElementById('release-value'); function updateEnvelope() { attack = attackSlider.value / 1000; // convert ms to seconds decay = decaySlider.value / 1000; sustain = parseFloat(sustainSlider.value); release = releaseSlider.value / 1000; synth.set({ envelope: { attack, decay, sustain, release } }); attackValue.textContent = `${attackSlider.value} ms`; decayValue.textContent = `${decaySlider.value} ms`; sustainValue.textContent = sustain.toFixed(2); releaseValue.textContent = `${releaseSlider.value} ms`; } attackSlider.addEventListener('input', updateEnvelope); decaySlider.addEventListener('input', updateEnvelope); sustainSlider.addEventListener('input', updateEnvelope); releaseSlider.addEventListener('input', updateEnvelope); // Initialize display updateEnvelope(); // Piano keyboard generation const keyboard = document.getElementById('keyboard'); const keyMappingDiv = document.getElementById('key-mapping'); // Notes for two octaves: C4 to B5 const whiteNotes = ['C4', 'D4', 'E4', 'F4', 'G4', 'A4', 'B4', 'C5', 'D5', 'E5', 'F5', 'G5', 'A5', 'B5']; const blackNotes = ['C#4', 'D#4', '', 'F#4', 'G#4', 'A#4', '', 'C#5', 'D#5', '', 'F#5', 'G#5', 'A#5', '']; // Mapping of computer keys to notes (two rows) // First row: white keys A-L (C4-B4), black keys W,E,T,Y,U (C#4 etc.) // Second row: white keys Z-; (C5-B5), black keys S,D,G,H,J (C#5 etc.) const keyToNote = { // First octave white 'a': 'C4', 's': 'D4', 'd': 'E4', 'f': 'F4', 'g': 'G4', 'h': 'A4', 'j': 'B4', // First octave black 'w': 'C#4', 'e': 'D#4', 't': 'F#4', 'y': 'G#4', 'u': 'A#4', // Second octave white 'z': 'C5', 'x': 'D5', 'c': 'E5', 'v': 'F5', 'b': 'G5', 'n': 'A5', 'm': 'B5', // Second octave black 'q': 'C#5', 'r': 'D#5', 'i': 'F#5', 'o': 'G#5', 'p': 'A#5' }; // Generate key mapping display for (const [key, note] of Object.entries(keyToNote)) { const div = document.createElement('div'); div.className = 'key-map-item'; div.innerHTML = `<kbd>${key.toUpperCase()}</kbd> <span>${note}</span>`; keyMappingDiv.appendChild(div); } // Create white and black keys const whiteKeyWidth = 100 / whiteNotes.length; // percentage whiteNotes.forEach((note, index) => { const key = document.createElement('div'); key.className = 'white-key'; key.dataset.note = note; key.style.width = `${whiteKeyWidth}%`; key.style.left = `${index * whiteKeyWidth}%`; // Add event listeners key.addEventListener('mousedown', () => playNote(note, key)); key.addEventListener('mouseup', () => stopNote(key)); key.addEventListener('mouseleave', () => stopNote(key)); keyboard.appendChild(key); }); // Black keys positioned relative to white keys blackNotes.forEach((note, index) => { if (!note) return; // skip empty slots (E/F and B/C gaps) const key = document.createElement('div'); key.className = 'black-key'; key.dataset.note = note; // Position black key between white keys // Black keys are at positions 0,1,3,4,5 for each octave pattern // We'll compute offset based on index within blackNotes array // There are 2 black keys, then a gap, then 3 black keys, then a gap per octave // Let's just compute using white key positions plus offset const whitePos = index; // index of preceding white key let offset = 0; if (index % 7 === 0 || index % 7 === 1) offset = 0.6; // C#, D# else if (index % 7 === 3 || index % 7 === 4 || index % 7 === 5) offset = 0.6; // F#, G#, A# // Actually simpler: black key is placed between white key i and i+1, leaning right // We'll set left at whitePos * whiteKeyWidth + whiteKeyWidth * 0.7 const leftPercent = (whitePos * whiteKeyWidth) + whiteKeyWidth * 0.7; key.style.left = `${leftPercent}%`; key.addEventListener('mousedown', () => playNote(note, key)); key.addEventListener('mouseup', () => stopNote(key)); key.addEventListener('mouseleave', () => stopNote(key)); keyboard.appendChild(key); }); // Play note function function playNote(note, keyElement) { // Visual feedback keyElement.classList.add('pressed'); // Play sound synth.triggerAttack(note, Tone.now()); } function stopNote(keyElement) { keyElement.classList.remove('pressed'); synth.triggerRelease(Tone.now()); } // Keyboard events const pressedKeys = new Set(); document.addEventListener('keydown', (e) => { if (e.repeat) return; const key = e.key.toLowerCase(); const note = keyToNote[key]; if (note && !pressedKeys.has(key)) { pressedKeys.add(key); [26 more lines in file. Use offset=430 to continue.]

assistant

thinking

We need to read the rest. Let's get the rest of the script. Let's read from line 430.

→ read {"path":"/tmp/ws/index.html"}

toolResult

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Tone.js Piano</title> <style> * { box-sizing: border-box; margin: 0; padding: 0; } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, #1a1a2e, #16213e); color: #fff; min-height: 100vh; display: flex; flex-direction: column; align-items: center; padding: 2rem; } h1 { margin-bottom: 0.5rem; font-size: 2.8rem; background: linear-gradient(to right, #00dbde, #fc00ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-shadow: 0 2px 4px rgba(0,0,0,0.3); } .subtitle { margin-bottom: 2rem; color: #a0a0c0; font-size: 1.1rem; text-align: center; } .container { display: flex; flex-direction: column; align-items: center; width: 100%; max-width: 1200px; gap: 2rem; } .piano-container { width: 100%; background: rgba(0, 0, 0, 0.4); border-radius: 20px; padding: 2rem; box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5); border: 1px solid rgba(255, 255, 255, 0.1); } .piano { position: relative; width: 100%; height: 280px; margin: 0 auto; user-select: none; } .keyboard { position: absolute; width: 100%; height: 100%; display: flex; } .white-key { position: relative; flex: 1; background: linear-gradient(to bottom, #fff 0%, #f5f5f5 100%); border: 2px solid #333; border-radius: 0 0 10px 10px; margin-left: -1px; z-index: 1; cursor: pointer; transition: all 0.1s; box-shadow: inset 0 -5px 10px rgba(0,0,0,0.1); } .white-key:first-child { margin-left: 0; } .white-key.pressed { background: linear-gradient(to bottom, #ffcc00 0%, #ffaa00 100%); transform: translateY(5px); box-shadow: inset 0 5px 10px rgba(0,0,0,0.2); } .black-key { position: absolute; width: 7%; height: 65%; background: linear-gradient(to bottom, #333 0%, #000 100%); border-radius: 0 0 8px 8px; z-index: 2; cursor: pointer; transition: all 0.1s; box-shadow: 0 5px 10px rgba(0,0,0,0.5); } .black-key.pressed { background: linear-gradient(to bottom, #ff9900 0%, #ff6600 100%); transform: translateY(5px); box-shadow: inset 0 5px 10px rgba(0,0,0,0.3); } .controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; width: 100%; background: rgba(0, 0, 0, 0.4); border-radius: 20px; padding: 2rem; box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3); border: 1px solid rgba(255, 255, 255, 0.1); } .adsr-controls { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; } .control-group { display: flex; flex-direction: column; align-items: center; min-width: 180px; } .control-group label { margin-bottom: 0.5rem; font-size: 1.1rem; color: #a0a0c0; } .control-group input[type="range"] { width: 100%; height: 10px; -webkit-appearance: none; appearance: none; background: linear-gradient(to right, #00dbde, #fc00ff); border-radius: 5px; outline: none; } .control-group input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 24px; height: 24px; border-radius: 50%; background: #fff; cursor: pointer; box-shadow: 0 0 10px rgba(0,0,0,0.5); } .value-display { margin-top: 0.5rem; font-size: 1.2rem; color: #fff; font-weight: bold; min-height: 1.5rem; } .instructions { margin-top: 1rem; text-align: center; color: #a0a0c0; line-height: 1.6; max-width: 800px; } .footer { margin-top: 2rem; color: #666; font-size: 0.9rem; text-align: center; } .key-mapping { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; width: 100%; margin-top: 1rem; } .key-map-item { background: rgba(255,255,255,0.05); padding: 0.8rem; border-radius: 10px; display: flex; justify-content: space-between; } .key-map-item kbd { background: #333; color: #fff; padding: 0.2rem 0.5rem; border-radius: 5px; font-family: monospace; } @media (max-width: 768px) { .piano { height: 200px; } .controls { flex-direction: column; align-items: center; } .adsr-controls { flex-direction: column; } } </style> </head> <body> <div class="container"> <h1>Tone.js Piano</h1> <p class="subtitle">A playable synthesizer with ADSR envelope control. Use mouse or computer keyboard.</p> <div class="piano-container"> <div class="piano"> <div class="keyboard" id="keyboard">  </div> </div> </div> <div class="controls"> <h2 style="width:100%; text-align:center; margin-bottom:1rem;">ADSR Envelope Controls</h2> <div class="adsr-controls"> <div class="control-group"> <label for="attack">Attack (ms)</label> <input type="range" id="attack" min="1" max="2000" value="50" step="1"> <div class="value-display" id="attack-value">50 ms</div> </div> <div class="control-group"> <label for="decay">Decay (ms)</label> <input type="range" id="decay" min="1" max="2000" value="200" step="1"> <div class="value-display" id="decay-value">200 ms</div> </div> <div class="control-group"> <label for="sustain">Sustain (0‑1)</label> <input type="range" id="sustain" min="0" max="1" value="0.7" step="0.01"> <div class="value-display" id="sustain-value">0.70</div> </div> <div class="control-group"> <label for="release">Release (ms)</label> <input type="range" id="release" min="1" max="5000" value="1000" step="1"> <div class="value-display" id="release-value">1000 ms</div> </div> </div> </div> <div class="instructions"> <h3>Keyboard Mapping</h3> <p>Use the keys A through L for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br> For the second octave, use Z through ; for white notes (C5 to B5), and S, D, G, H, J for black notes.</p> <div class="key-mapping" id="key-mapping">  </div> <p style="margin-top:1rem;">Click on piano keys with mouse. Adjust ADSR sliders to shape the sound envelope.</p> </div> <div class="footer"> Powered by <a href="https://tonejs.github.io/" style="color:#8a2be2;">Tone.js</a> • No external resources • Fully sandboxed </div> </div> <script src="tone.min.js"></script> <script> // Wait for DOM and Tone to be ready document.addEventListener('DOMContentLoaded', () => { // Initialize Tone Tone.start(); // ADSR parameters let attack = 0.05; // seconds let decay = 0.2; let sustain = 0.7; let release = 1.0; // Create synth with ADSR envelope const synth = new Tone.Synth({ oscillator: { type: 'sine' }, envelope: { attack, decay, sustain, release } }).toDestination(); // Update envelope when sliders change const attackSlider = document.getElementById('attack'); const decaySlider = document.getElementById('decay'); const sustainSlider = document.getElementById('sustain'); const releaseSlider = document.getElementById('release'); const attackValue = document.getElementById('attack-value'); const decayValue = document.getElementById('decay-value'); const sustainValue = document.getElementById('sustain-value'); const releaseValue = document.getElementById('release-value'); function updateEnvelope() { attack = attackSlider.value / 1000; // convert ms to seconds decay = decaySlider.value / 1000; sustain = parseFloat(sustainSlider.value); release = releaseSlider.value / 1000; synth.set({ envelope: { attack, decay, sustain, release } }); attackValue.textContent = `${attackSlider.value} ms`; decayValue.textContent = `${decaySlider.value} ms`; sustainValue.textContent = sustain.toFixed(2); releaseValue.textContent = `${releaseSlider.value} ms`; } attackSlider.addEventListener('input', updateEnvelope); decaySlider.addEventListener('input', updateEnvelope); sustainSlider.addEventListener('input', updateEnvelope); releaseSlider.addEventListener('input', updateEnvelope); // Initialize display updateEnvelope(); // Piano keyboard generation const keyboard = document.getElementById('keyboard'); const keyMappingDiv = document.getElementById('key-mapping'); // Notes for two octaves: C4 to B5 const whiteNotes = ['C4', 'D4', 'E4', 'F4', 'G4', 'A4', 'B4', 'C5', 'D5', 'E5', 'F5', 'G5', 'A5', 'B5']; const blackNotes = ['C#4', 'D#4', '', 'F#4', 'G#4', 'A#4', '', 'C#5', 'D#5', '', 'F#5', 'G#5', 'A#5', '']; // Mapping of computer keys to notes (two rows) // First row: white keys A-L (C4-B4), black keys W,E,T,Y,U (C#4 etc.) // Second row: white keys Z-; (C5-B5), black keys S,D,G,H,J (C#5 etc.) const keyToNote = { // First octave white 'a': 'C4', 's': 'D4', 'd': 'E4', 'f': 'F4', 'g': 'G4', 'h': 'A4', 'j': 'B4', // First octave black 'w': 'C#4', 'e': 'D#4', 't': 'F#4', 'y': 'G#4', 'u': 'A#4', // Second octave white 'z': 'C5', 'x': 'D5', 'c': 'E5', 'v': 'F5', 'b': 'G5', 'n': 'A5', 'm': 'B5', // Second octave black 'q': 'C#5', 'r': 'D#5', 'i': 'F#5', 'o': 'G#5', 'p': 'A#5' }; // Generate key mapping display for (const [key, note] of Object.entries(keyToNote)) { const div = document.createElement('div'); div.className = 'key-map-item'; div.innerHTML = `<kbd>${key.toUpperCase()}</kbd> <span>${note}</span>`; keyMappingDiv.appendChild(div); } // Create white and black keys const whiteKeyWidth = 100 / whiteNotes.length; // percentage whiteNotes.forEach((note, index) => { const key = document.createElement('div'); key.className = 'white-key'; key.dataset.note = note; key.style.width = `${whiteKeyWidth}%`; key.style.left = `${index * whiteKeyWidth}%`; // Add event listeners key.addEventListener('mousedown', () => playNote(note, key)); key.addEventListener('mouseup', () => stopNote(key)); key.addEventListener('mouseleave', () => stopNote(key)); keyboard.appendChild(key); }); // Black keys positioned relative to white keys blackNotes.forEach((note, index) => { if (!note) return; // skip empty slots (E/F and B/C gaps) const key = document.createElement('div'); key.className = 'black-key'; key.dataset.note = note; // Position black key between white keys // Black keys are at positions 0,1,3,4,5 for each octave pattern // We'll compute offset based on index within blackNotes array // There are 2 black keys, then a gap, then 3 black keys, then a gap per octave // Let's just compute using white key positions plus offset const whitePos = index; // index of preceding white key let offset = 0; if (index % 7 === 0 || index % 7 === 1) offset = 0.6; // C#, D# else if (index % 7 === 3 || index % 7 === 4 || index % 7 === 5) offset = 0.6; // F#, G#, A# // Actually simpler: black key is placed between white key i and i+1, leaning right // We'll set left at whitePos * whiteKeyWidth + whiteKeyWidth * 0.7 const leftPercent = (whitePos * whiteKeyWidth) + whiteKeyWidth * 0.7; key.style.left = `${leftPercent}%`; key.addEventListener('mousedown', () => playNote(note, key)); key.addEventListener('mouseup', () => stopNote(key)); key.addEventListener('mouseleave', () => stopNote(key)); keyboard.appendChild(key); }); // Play note function function playNote(note, keyElement) { // Visual feedback keyElement.classList.add('pressed'); // Play sound synth.triggerAttack(note, Tone.now()); } function stopNote(keyElement) { keyElement.classList.remove('pressed'); synth.triggerRelease(Tone.now()); } // Keyboard events const pressedKeys = new Set(); document.addEventListener('keydown', (e) => { if (e.repeat) return; const key = e.key.toLowerCase(); const note = keyToNote[key]; if (note && !pressedKeys.has(key)) { pressedKeys.add(key); // Find the key element const keyElement = document.querySelector(`[data-note="${note}"]`); if (keyElement) { playNote(note, keyElement); } } }); document.addEventListener('keyup', (e) => { const key = e.key.toLowerCase(); const note = keyToNote[key]; if (note && pressedKeys.has(key)) { pressedKeys.delete(key); const keyElement = document.querySelector(`[data-note="${note}"]`); if (keyElement) { stopNote(keyElement); } } }); // Prevent context menu on piano keyboard.addEventListener('contextmenu', (e) => e.preventDefault()); }); </script> </body> </html>

assistant

thinking

Now we need to replace the script with a better version. Let's write a new script that uses PolySynth, better mouse handling, accurate black key positioning, and polyphonic note release. We'll also fix the key mapping to include all keys we have (including missing ones like ';' etc). Actually we have only up to 'm' for white keys, but we have two octaves of white keys: first octave 7 white keys (C4-B4) mapped to a,s,d,f,g,h,j. That's correct. Second octave white keys (C5-B5) 7 keys: we used z,x,c,v,b,n,m. That's also correct. Black keys first octave: w,e,t,y,u (C#4,D#4,F#4,G#4,A#4). That's correct. Second octave black keys: we used q,r,i,o,p (C#5,D#5,F#5,G#5,A#5). However we also have black keys S,D,G,H,J? That's duplicate mapping. Actually the instructions mention S,D,G,H,J for second octave black notes, but we already used S for D4 white key. That's conflicting. Let's adjust: We'll keep mapping as we have, but we need to align with typical piano keyboard layout. Let's think: Common mapping is rows: First row: white keys A-L, black keys W,E,T,Y,U. Second row: white keys Z-;, black keys S,D,G,H,J. That's typical in many online pianos. However we have only 7 white keys per octave, so we need to map accordingly. Let's implement that mapping.

We'll change keyToNote to match that layout. Let's create mapping for two octaves: first octave white keys A through K? Actually we have 7 white keys, we can map A to C4, S to D4, D to E4, F to F4, G to G4, H to A4, J to B4. That's what we have. Black keys: W to C#4, E to D#4, T to F#4, Y to G#4, U to A#4. Good.

Second octave white keys: Z to C5, X to D5, C to E5, V to F5, B to G5, N to A5, M to B5. That's what we have. Black keys: S to C#5? but S is already used for D4. Let's shift: second row black keys are S,D,G,H,J (since they are below W,E,T,Y,U). So we need to map S to C#5, D to D#5, G to F#5, H to G#5, J to A#5. However we already used D for E4 (white). That's a conflict. We'll need to choose different keys. Maybe we can use Q,R,I,O,P for second octave black keys as we have. But Q is far left. Let's follow typical mapping: second row black keys are S,D,G,H,J. Let's reassign white keys for second octave to Z,X,C,V,B,N,M (already). Then we can use S for C#5, D for D#5, G for F#5, H for G#5, J for A#5. But D is already used for E4 white. That's a conflict across octaves, but we can allow overlapping? Actually we can have same key map to different notes depending on octave? That would be confusing. Better to have unique keys. Let's keep mapping as we have (q,r,i,o,p) and adjust instructions accordingly.

Let's update instructions text accordingly.

Now let's rewrite the script. We'll replace from the line `<script>` to the closing `</script>` with new content. We'll need to get the exact old text. We'll use edit with oldText being the entire script block (including the opening and closing tags). Let's capture the exact old text from line 285 to the end of the file (but we need to stop before </body>). Let's extract from `<script src="tone.min.js"></script>`? Actually there are two script tags: one for external, one for inline. We'll replace the second script tag (the inline one). Let's find the exact string:

`<script>\n        // Wait for DOM and Tone to be ready\n        document.addEventListener('DOMContentLoaded', () => {\n            // Initialize Tone\n            Tone.start();\n\n            // ADSR parameters\n            let attack = 0.05;   // seconds\n            let decay = 0.2;\n            let sustain = 0.7;\n            let release = 1.0;\n\n            // Create synth with ADSR envelope\n            const synth = new Tone.Synth({\n                oscillator: {\n                    type: 'sine'\n                },\n                envelope: {\n                    attack,\n                    decay,\n                    sustain,\n                    release\n                }\n            }).toDestination();\n\n            // Update envelope when sliders change\n            const attackSlider = document.getElementById('attack');\n            const decaySlider = document.getElementById('decay');\n            const sustainSlider = document.getElementById('sustain');\n            const releaseSlider = document.getElementById('release');\n            const attackValue = document.getElementById('attack-value');\n            const decayValue = document.getElementById('decay-value');\n            const sustainValue = document.getElementById('sustain-value');\n            const releaseValue = document.getElementById('release-value');\n\n            function updateEnvelope() {\n                attack = attackSlider.value / 1000; // convert ms to seconds\n                decay = decaySlider.value / 1000;\n                sustain = parseFloat(sustainSlider.value);\n                release = releaseSlider.value / 1000;\n                synth.set({ envelope: { attack, decay, sustain, release } });\n                attackValue.textContent = `${attackSlider.value} ms`;\n                decayValue.textContent = `${decaySlider.value} ms`;\n                sustainValue.textContent = sustain.toFixed(2);\n                releaseValue.textContent = `${releaseSlider.value} ms`;\n            }\n\n            attackSlider.addEventListener('input', updateEnvelope);\n            decaySlider.addEventListener('input', updateEnvelope);\n            sustainSlider.addEventListener('input', updateEnvelope);\n            releaseSlider.addEventListener('input', updateEnvelope);\n\n            // Initialize display\n            updateEnvelope();\n\n            // Piano keyboard generation\n            const keyboard = document.getElementById('keyboard');\n            const keyMappingDiv = document.getElementById('key-mapping');\n\n            // Notes for two octaves: C4 to B5\n            const whiteNotes = ['C4', 'D4', 'E4', 'F4', 'G4', 'A4', 'B4', 'C5', 'D5', 'E5', 'F5', 'G5', 'A5', 'B5'];\n            const blackNotes = ['C#4', 'D#4', '', 'F#4', 'G#4', 'A#4', '', 'C#5', 'D#5', '', 'F#5', 'G#5', 'A#5', ''];\n            // Mapping of computer keys to notes (two rows)\n            // First row: white keys A-L (C4-B4), black keys W,E,T,Y,U (C#4 etc.)\n            // Second row: white keys Z-; (C5-B5), black keys S,D,G,H,J (C#5 etc.)\n            const keyToNote = {\n                // First octave white\n                'a': 'C4', 's': 'D4', 'd': 'E4', 'f': 'F4', 'g': 'G4', 'h': 'A4', 'j': 'B4',\n                // First octave black\n                'w': 'C#4', 'e': 'D#4', 't': 'F#4', 'y': 'G#4', 'u': 'A#4',\n                // Second octave white\n                'z': 'C5', 'x': 'D5', 'c': 'E5', 'v': 'F5', 'b': 'G5', 'n': 'A5', 'm': 'B5',\n                // Second octave black\n                'q': 'C#5', 'r': 'D#5', 'i': 'F#5', 'o': 'G#5', 'p': 'A#5'\n            };\n\n            // Generate key mapping display\n            for (const [key, note] of Object.entries(keyToNote)) {\n                const div = document.createElement('div');\n                div.className = 'key-map-item';\n                div.innerHTML = `<kbd>${key.toUpperCase()}</kbd> <span>${note}</span>`;\n                keyMappingDiv.appendChild(div);\n            }\n\n            // Create white and black keys\n            const whiteKeyWidth = 100 / whiteNotes.length; // percentage\n            whiteNotes.forEach((note, index) => {\n                const key = document.createElement('div');\n                key.className = 'white-key';\n                key.dataset.note = note;\n                key.style.width = `${whiteKeyWidth}%`;\n                key.style.left = `${index * whiteKeyWidth}%`;\n                // Add event listeners\n                key.addEventListener('mousedown', () => playNote(note, key));\n                key.addEventListener('mouseup', () => stopNote(key));\n                key.addEventListener('mouseleave', () => stopNote(key));\n                keyboard.appendChild(key);\n            });\n\n            // Black keys positioned relative to white keys\n            blackNotes.forEach((note, index) => {\n                if (!note) return; // skip empty slots (E/F and B/C gaps)\n                const key = document.createElement('div');\n                key.className = 'black-key';\n                key.dataset.note = note;\n                // Position black key between white keys\n                // Black keys are at positions 0,1,3,4,5 for each octave pattern\n                // We'll compute offset based on index within blackNotes array\n                // There are 2 black keys, then a gap, then 3 black keys, then a gap per octave\n                // Let's just compute using white key positions plus offset\n                const whitePos = index; // index of preceding white key\n                let offset = 0;\n                if (index % 7 === 0 || index % 7 === 1) offset = 0.6; // C#, D#\n                else if (index % 7 === 3 || index % 7 === 4 || index % 7 === 5) offset = 0.6; // F#, G#, A#\n                // Actually simpler: black key is placed between white key i and i+1, leaning right\n                // We'll set left at whitePos * whiteKeyWidth + whiteKeyWidth * 0.7\n                const leftPercent = (whitePos * whiteKeyWidth) + whiteKeyWidth * 0.7;\n                key.style.left = `${leftPercent}%`;\n                key.addEventListener('mousedown', () => playNote(note, key));\n                key.addEventListener('mouseup', () => stopNote(key));\n                key.addEventListener('mouseleave', () => stopNote(key));\n                keyboard.appendChild(key);\n            });\n\n            // Play note function\n            function playNote(note, keyElement) {\n                // Visual feedback\n                keyElement.classList.add('pressed');\n                // Play sound\n                synth.triggerAttack(note, Tone.now());\n            }\n\n            function stopNote(keyElement) {\n                keyElement.classList.remove('pressed');\n                synth.triggerRelease(Tone.now());\n            }\n\n            // Keyboard events\n            const pressedKeys = new Set();\n            document.addEventListener('keydown', (e) => {\n                if (e.repeat) return;\n                const key = e.key.toLowerCase();\n                const note = keyToNote[key];\n                if (note && !pressedKeys.has(key)) {\n                    pressedKeys.add(key);\n                    // Find the key element\n                    const keyElement = document.querySelector(`[data-note="${note}"]`);\n                    if (keyElement) {\n                        playNote(note, keyElement);\n                    }\n                }\n            });\n\n            document.addEventListener('keyup', (e) => {\n                const key = e.key.toLowerCase();\n                const note = keyToNote[key];\n                if (note && pressedKeys.has(key)) {\n                    pressedKeys.delete(key);\n                    const keyElement = document.querySelector(`[data-note="${note}"]`);\n                    if (keyElement) {\n                        stopNote(keyElement);\n                    }\n                }\n            });\n\n            // Prevent context menu on piano\n            keyboard.addEventListener('contextmenu', (e) => e.preventDefault());\n        });\n    </script>`

But we need to include the exact whitespace. Let's copy from the file directly. Let's write a small bash to extract from line 285 to end, but we need to isolate the script block. Let's do a simple approach: we'll replace the entire file with a new version? That's wasteful but we can do that because we already have the CSS and HTML structure. Let's create a new index.html with the updated script. But we must keep the CSS and HTML exactly as they are (they're fine). Let's edit the file with a precise replacement of the second script block.

We'll locate the exact old text by searching for "// Wait for DOM and Tone to be ready". We'll replace from that line to the line before the closing script tag. Let's get the exact lines from the file using bash with sed to see line numbers. Let's write a script to find start and end line numbers. Let's do:

→ bash {"command":"grep -n \"// Wait for DOM and Tone to be ready\" /tmp/ws/index.html"}

toolResult

286: // Wait for DOM and Tone to be ready

assistant

thinking

Now we need the line number of the closing script tag. Let's find the line number of the last occurrence of "</script>" after line 286. Let's do:

→ bash {"command":"sed -n '286,$p' /tmp/ws/index.html | grep -n \"</script>\" | head -1"}

toolResult

168: </script>

assistant

thinking

So relative line 168 from line 286 means absolute line 286 + 168 - 1 = 453? Let's compute: 286 + 168 = 454, minus 1 because line numbers start at 1? Actually we need to be careful. Let's just get the exact lines from 286 to end and find the line number of the first closing script tag after that. Let's use awk. Let's do a quick python? Let's just write a small script, but we can approximate. However we need to ensure we replace exactly the whole script block, not just part. Let's instead write a new index.html with the updated script, but keep everything else. That's safer. Since we already have the full content, we can edit the file by replacing the entire script block (including the opening `<script>` tag). Let's capture the exact old text from the file using read with offset 285? Actually we can read from line 285 (the `<script>` line) to line 454 (the closing script tag). Let's count lines: we have 454 lines total? Let's get total lines:

→ bash {"command":"wc -l /tmp/ws/index.html"}

toolResult

454 /tmp/ws/index.html

assistant

thinking

Great. So we can replace lines 285-454. Let's extract those lines to verify. Let's read lines 285-454. Let's do:

→ read {"path":"/tmp/ws/index.html"}

toolResult

assistant

thinking

Now we need to replace the script block with a new one. Let's create the new script. We'll write it as a separate string and then replace from line 285 to line 454. We'll do edit with oldText being the entire script block (including the opening <script> tag and closing tag). We'll need to capture exactly the text from "<script>" on line 285 to "</script>" on line 454. Let's extract that exact text using a small script but we can approximate by copying from the file from "<script>" to "</script>" inclusive. Let's write a Python one-liner but we can also use bash. Let's do:

`sed -n '285,454p' /tmp/ws/index.html > oldscript.txt`

But we can't write files? We can use bash tool. Let's do that and read the content. Let's run bash to capture.

→ bash {"command":"cd /tmp/ws && sed -n '285,454p' index.html > oldscript.txt && wc -l oldscript.txt"}

toolResult

170 oldscript.txt

assistant

thinking

Great, 170 lines. Let's read it to ensure it's exactly the script block.

→ read {"path":"/tmp/ws/oldscript.txt"}

toolResult

assistant

thinking

We need to exclude the closing </body> and </html> lines. Actually the script block ends before the </body> tag. The extracted lines include the closing body and html tags because we included lines up to 454 (end of file). Let's adjust: we need to replace only the script block, not the rest. Let's find the line number of the closing script tag exactly. Let's search for the line number of the last `</script>` before `</body>`. We'll use awk. Let's do:

→ bash {"command":"grep -n \"</script>\" /tmp/ws/index.html | tail -1"}

toolResult

453: </script>

assistant

thinking

Great, line 453. So the script block is lines 285-453 (inclusive). Let's extract those lines. Let's create new oldscript.txt with those lines. Let's do:

→ bash

{"command":"cd /tmp/ws && sed -n '285,453p' index.html > oldscript2.txt && head -1 oldscript2.txt && tail -1 oldscript2.txt"}

toolResult

assistant

thinking

Perfect. Now we have the exact old text. Let's read it fully to ensure no extra whitespace differences. We'll store the content as a variable in our mind, but we can just use edit with oldText being the content of that file. Let's read the whole file.

→ read {"path":"/tmp/ws/oldscript2.txt"}

toolResult

assistant

thinking

Now we need to create new script content. Let's write it now. We'll incorporate PolySynth, better black key positioning, mouse tracking, and polyphonic note release. We'll also update the key mapping to match the instructions (second octave black keys S,D,G,H,J). Let's adjust key mapping accordingly, but we must avoid conflict with first octave white keys. We'll keep first octave white keys A,S,D,F,G,H,J (but S and D are used for second octave black keys). That's a conflict. We need to decide which mapping is more intuitive. Typical online piano mapping uses first row: white keys A-L, black keys W,E,T,Y,U. Second row: white keys Z-;, black keys S,D,G,H,J. That means S and D are black keys of second octave, but they are also white keys of first octave? Actually first octave white keys are A,S,D,F,G,H,J (S and D are white keys D4 and E4). That's overlapping. Usually they map second row shifted to the right: Z,X,C,V,B,N,M for white keys, and S,D,G,H,J for black keys. That's what we have, but we need to rename the first octave white keys to avoid using S and D? Actually first octave white keys are A,S,D,F,G,H,J (S and D are used). That's fine because those are different octaves. The user can press S for D4 (white) or S for C#5? Wait S is mapped to both? That's ambiguous. In typical mapping, the second row black keys are shifted right so that S is above Z (C5) and D above X (D5). That means S is C#5, D is D#5. That's second octave black keys, not first octave white keys. However the first octave white keys are A,S,D,F,G,H,J (S is D4, D is E4). So the same key triggers two different notes depending on row? That's not possible. Usually they map separate keys: first row white keys A through K (maybe A,S,D,F,G,H,J,K?). Actually typical mapping is: first row white keys: A,S,D,F,G,H,J. Black keys: W,E,T,Y,U. Second row white keys: Z,X,C,V,B,N,M. Black keys: S,D,G,H,J (but S and D are already used for first row white keys). Wait maybe they map second row black keys to different letters like Q,R,U,I,O. I think we should keep our current mapping (q,r,i,o,p) and adjust instructions accordingly. Let's update the instructions text to reflect our mapping.

Now let's craft the new script. We'll write it step by step and then embed. Let's create the new script content as a string. We'll do this in Python but we can write directly in edit. Let's first create a new file with the new script, then replace. Let's do it in bash using cat. Let's create a newscript.js file with the content. We'll write it manually. Let's start by opening a write command for a temporary file, but we can also embed directly in edit. Let's construct newScript variable in our mind. Let's just write the new script now. We'll keep the same outer structure but replace the inner implementation.

We'll need to update the instructions paragraph as well. That's separate HTML. We'll also edit that. Let's first edit the instructions paragraph to reflect the correct mapping. We'll change the text in the HTML. Let's locate the paragraph with the mapping description. We'll edit that part. Let's find the line numbers for that paragraph. Let's search for "Keyboard Mapping". Let's use bash to find line number.

→ bash {"command":"grep -n \"Keyboard Mapping\" /tmp/ws/index.html"}

toolResult

270: <h3>Keyboard Mapping</h3>

assistant

thinking

Now we need to replace the paragraph below. Let's read lines around 270. Let's read from 265 to 280.

→ read {"path":"/tmp/ws/index.html"}

toolResult

assistant

thinking

We need to locate the exact paragraph. Let's search for "Use the keys A through L". Let's get line numbers:

→ bash {"command":"grep -n \"Use the keys A through L\" /tmp/ws/index.html"}

toolResult

271: <p>Use the keys A through L for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>

assistant

thinking

Now we need to replace that paragraph and the next line. Let's get lines 271-273. Let's view lines 270-280. Let's do a quick bash to see. Let's write a script but easier: we'll edit with oldText being the paragraph from "<p>Use the keys ...</p>" up to the closing p tag. Actually there are two lines: the first line with <br> and the second line. We'll replace the entire <p> element. Let's capture the exact old text:

`<p>Use the keys A through L for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>
               For the second octave, use Z through ; for white notes (C5 to B5), and S, D, G, H, J for black notes.</p>`

We need to replace with updated mapping. We'll keep the same structure but change the second octave black keys to Q, R, I, O, P. Also we should keep the first octave mapping as is. Let's write new paragraph:

`<p>Use the keys A, S, D, F, G, H, J for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>
               For the second octave, use Z, X, C, V, B, N, M for white notes (C5 to B5), and Q, R, I, O, P for black notes.</p>`

But we also have mapping for "A through L" earlier? Actually we used A through J (7 keys). Let's just keep original phrasing but adjust second octave black keys. Let's do:

`<p>Use the keys A through J for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>
               For the second octave, use Z through M for white notes (C5 to B5), and Q, R, I, O, P for black notes.</p>`

Now we need to edit the file. We'll also need to update the key mapping display generated by JS accordingly (we'll adjust keyToNote). Let's do both edits: one for the HTML paragraph, another for the script block. We'll do two separate edit calls.

Let's first edit the paragraph. We'll need exact old text with line breaks. Let's copy exactly from the file. We'll read lines 271-273. Let's extract using sed to get the exact string. Let's do:

`sed -n '271,273p' /tmp/ws/index.html`

But we need to include the indentation. Let's write a quick bash to get the exact text with newline. Let's do:

→ bash {"command":"cd /tmp/ws && sed -n '271,273p' index.html | cat -A"}

toolResult

<p>Use the keys A through L for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>$ For the second octave, use Z through ; for white notes (C5 to B5), and S, D, G, H, J for black notes.</p>$ <div class="key-mapping" id="key-mapping">$

assistant

thinking

We need only the paragraph lines (271 and 272). Actually line 273 is the div. So oldText is lines 271-272 exactly as they appear with indentation (12 spaces? Let's count). Let's capture exactly:

`            <p>Use the keys A through L for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#4, F#4, G#4, A#4).<br>
               For the second octave, use Z through ; for white notes (C5 to B5), and S, D, G, H, J for black notes.</p>`

Now we need to replace with new text. Let's keep same indentation. Let's write edit. First, let's do the edit.

→ edit

{"edits":[{"newText":"            <p>Use the keys A, S, D, F, G, H, J for white notes (C4 to B4), and W, E, T, Y, U for black notes (C#4, D#

toolResult

Successfully replaced 1 block(s) in /tmp/ws/index.html.

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

modeldeepseek-v3.1-terminus

vendorDeepSeek

harnesspi-agent

generated2026-08-01

EVALUATION

★★★★★ 3/5 partial

Piano keyboard with ADSR sliders renders; keys don't visually highlight on click/wheel/wasd, only scrolling reveals a keyboard-mapping legend on enter/space/arrows.

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.

idle motion0.0%

on click0.0%

on drag0.0%

on wheel0.0%

on enter + space66.1%

on arrow keys7.9%

on w/a/s/d0.0%

frame spread65.6 / 255

console errors0

js errors none

METRICS

runtime600.1s

tokens in343k

tokens out12k

cached253k

cost / run$0.0701