Piano synth · muse-wonder
Output generated Cost / run $0.4922 Runtime 88.4s
Prompt for this run
Build a playable piano keyboard using the provided Tone.js library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `tone.min.js` (global `Tone`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Display one chromatic octave from C4 through C5, with correctly placed black and white keys and visible note labels. - Map computer keys A W S E D F T G Y H U J K in order to those 13 notes. Pressing a screen key or its computer key starts the note; releasing it starts the envelope's release phase. - Use a synthesized voice with an ADSR envelope and support at least three simultaneous notes. Highlight keys while held. Prevent keyboard auto-repeat from creating duplicate sustained voices. - Release held voices when the pointer is released outside a key or the window loses focus, so notes cannot remain stuck. - Activate audio through a user gesture and synthesize all sound without audio files. Display the computer-key mapping. Verify: Play a few notes using the available mouse and keyboard actions. Check note/key labeling, any observable press-and-release highlighting, and the console after audio activation. Briefly inspect the input handlers for matching note-start and note-release behavior.
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
METRICS
Transcript · 21 messages
Build a playable piano keyboard using the provided Tone.js library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `tone.min.js` (global `Tone`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Display one chromatic octave from C4 through C5, with correctly placed black and white keys and visible note labels. - Map computer keys A W S E D F T G Y H U J K in order to those 13 notes. Pressing a screen key or its computer key starts the note; releasing it starts the envelope's release phase. - Use a synthesized voice with an ADSR envelope and support at least three simultaneous notes. Highlight keys while held. Prevent keyboard auto-repeat from creating duplicate sustained voices. - Release held voices when the pointer is released outside a key or the window loses focus, so notes cannot remain stuck. - Activate audio through a user gesture and synthesize all sound without audio files. Display the computer-key mapping. Verify: Play a few notes using the available mouse and keyboard actions. Check note/key labeling, any observable press-and-release highlighting, and the console after audio activation. Briefly inspect the input handlers for matching note-start and note-release behavior.
thinking
{"command":"ls -la; ls -lh tone.min.js 2>&1 | head"}total 356 drwx------ 3 node node 4096 Oct 15 04:08 . drwxrwxrwt 6 root root 4096 Oct 15 04:08 .. drwxr-xr-x 3 node node 4096 Oct 15 04:08 .home -rw-r--r-- 1 node node 349169 Oct 15 04:08 tone.min.js -rw-r--r-- 1 node node 341K Oct 15 04:08 tone.min.js
thinking
Implementing a Tone PolySynth with ADSR envelope, 13-note chromatic mapping, key highlighting, and release handling.Adding pointer capture and ref-counted holders to prevent stuck notes and duplicate voices
index.html (17890 bytes)Successfully wrote to index.html
thinking
{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:39959/8740646c-07e2-424a-a152-d2e1a9185400' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio not started — press any piano or computer key\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
thinking
{"action":"click","x":202,"y":560}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:39959/8740646c-07e2-424a-a152-d2e1a9185400' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio ready — play! (Tone.js running)\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
thinking
{"action":"key","text":"a"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:39959/8740646c-07e2-424a-a152-d2e1a9185400' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio ready — play! (Tone.js running)\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
thinking
Verifying UI interaction behavior and diagnosing a Tone worker error in a sandboxed iframe.
{"path":"index.html","edits":[{"oldText":" let synth=null, audioReady=false, starting=false;","newText":" let synth=null, audioReady=falseSuccessfully replaced 2 block(s) in index.html.
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:43113/f6a9182d-be16-4b72-8838-09d9fda45898' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio not started — press any piano or computer key\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
thinking
{"action":"drag","x":202,"y":520,"toX":650,"toY":520}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:43113/f6a9182d-be16-4b72-8838-09d9fda45898' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio ready — play! (Tone.js running)\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
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{"action":"key","text":"k"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:43113/f6a9182d-be16-4b72-8838-09d9fda45898' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [Piano] Ready. Notes: 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)"],"dom":"TONE.JS · POLYPHONIC SYNTH\nPlayable Piano\n\nOne chromatic octave, C4–C5. Click or tap a key, drag across keys, or use your computer keyboard. Hold for sustain — release and the envelope fades naturally.\n\nAudio ready — play! (Tone.js running)\nNow playing\n—\nTIMBRE\nWarm triangle\nSoft sine\nBright square\nBold sawtooth\nVOLUME\nComputer keys: A W S E D F T G Y H U J K\n✦ MUSE PIANO\nC4 — C5 · 13 NOTES\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nCOMPUTER-KEY MAPPING (IN ORDER)\nA\nC4\nW\nC#4\nS\nD4\nE\nD#4\nD\nE4\nF\nF4\nT\nF#4\nG\nG4\nY\nG#4\nH\nA4\nU\nA#4\nJ\nB4\nK\nC5\n0.02s\nATTACK\n0.25s\nDECAY\n45%\nSUSTAIN\n1.2s\nRELEASE\nSound is synthesized live with Tone.js — no audio files. Pressing starts a note (triggerAttack); releasing starts its release phase (triggerRelease). Try a chord: hold A + D + G together.","images":"attached"}
thinking
Built `index.html` — a single-page playable piano using the local `tone.min.js` (`Tone.PolySynth` with ADSR: 0.02s attack / 0.25s decay / 45% sustain / 1.2s release, 32-voice polyphony). **Features implemented:** - Chromatic octave C4–C5 (8 white, 5 correctly placed black keys) with note labels and computer-key caps on every key, plus a full mapping chip row - Computer keys `A W S E D F T G Y H U J K` mapped in order; press starts a note (`triggerAttack`), release starts the envelope release (`triggerRelease`) - Ref-counted holder tracking so mouse + keyboard holding the same note don't create duplicate voices; `e.repeat` is ignored to block auto-repeat retriggering - Keys and mapping chips highlight while held; “Now playing” chord readout - `pointerup`/`pointercancel` on `window`, drag-off-key handling, and `blur`/`visibilitychange` release-all so notes can't stick; glissando dragging supported - Audio starts only on a user gesture via `Tone.start()`; fully synthesized (no audio files); timbre and volume controls included **Verification performed (browser):** - Inspected initial render: all 13 notes/key labels and correct black-key placement visible; console log confirmed the A–K mapping order - Clicked C4: status flipped to “Audio ready — play!” with no new console errors - Dragged across keys and pressed computer keys `A` and `K`: notes triggered, and after release “Now playing” returned to “—” (no stuck/highlighted keys) - Reviewed input handlers for matched note-on/note-off behavior, including the shared-promise fix so a chord played as the very first gesture doesn't drop notes while audio starts **Not verified:** actual audible output (headless environment) and mid-hold highlight persistence, since the browser tool performs instant press-and-release; the blur-release path was verified by code inspection rather than simulation. One pre-existing console error about a Tone.js worker blocked by the sandbox CSP appears on load but does not affect playback.