Piano synth · muse-ember
Output generated Cost / run $0.0058 Runtime 25.1s
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.
METRICS
Transcript · 15 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.
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{"command":"pwd; ls -la"}/tmp/job-no2WR0 total 356 drwx------ 3 node node 4096 Nov 10 01:07 . drwxrwxrwt 8 root root 4096 Nov 10 01:07 .. drwxr-xr-x 3 node node 4096 Nov 10 01:07 .home -rw-r--r-- 1 node node 349169 Nov 10 01:07 tone.min.js
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Implementing a single-page Tonejs piano with key mapping, ADSR polyphony, UI highlighting, and audio activation on user gesture.
index.html (13383 bytes)Successfully wrote to index.html
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{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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","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","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","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"],"dom":"🎹 Chromatic Piano C4 – C5\n\nOne full chromatic octave (13 notes) • Synthesized with Tone.js • ADSR envelope • Polyphonic\n\nClick a key or press a computer key to enable audio\nActive notes: —\nTONE.JS SYNTH\nPIANO\nADSR\nC4\nA\nC#4\nW\nD4\nS\nD#4\nE\nE4\nD\nF4\nF\nF#4\nT\nG4\nG\nG#4\nY\nA4\nH\nA#4\nU\nB4\nJ\nC5\nK\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\n\nComputer keys A W S E D F T G Y H U J K map left-to-right to C4 → C5. Hold multiple keys for chords. Releasing (or dragging off / losing window focus) triggers the release phase — no stuck notes.","images":"attached"}
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{"action":"click","toX":247,"toY":322}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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","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","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","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"],"dom":"🎹 Chromatic Piano C4 – C5\n\nOne full chromatic octave (13 notes) • Synthesized with Tone.js • ADSR envelope • Polyphonic\n\nAudio ready — play!\nActive notes: —\nTONE.JS SYNTH\nPIANO\nADSR\nC4\nA\nC#4\nW\nD4\nS\nD#4\nE\nE4\nD\nF4\nF\nF#4\nT\nG4\nG\nG#4\nY\nA4\nH\nA#4\nU\nB4\nJ\nC5\nK\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\n\nComputer keys A W S E D F T G Y H U J K map left-to-right to C4 → C5. Hold multiple keys for chords. Releasing (or dragging off / losing window focus) triggers the release phase — no stuck notes.","images":"attached"}
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{"action":"key","text":"a"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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","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","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","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"],"dom":"🎹 Chromatic Piano C4 – C5\n\nOne full chromatic octave (13 notes) • Synthesized with Tone.js • ADSR envelope • Polyphonic\n\nAudio ready — play!\nActive notes: —\nTONE.JS SYNTH\nPIANO\nADSR\nC4\nA\nC#4\nW\nD4\nS\nD#4\nE\nE4\nD\nF4\nF\nF#4\nT\nG4\nG\nG#4\nY\nA4\nH\nA#4\nU\nB4\nJ\nC5\nK\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\n\nComputer keys A W S E D F T G Y H U J K map left-to-right to C4 → C5. Hold multiple keys for chords. Releasing (or dragging off / losing window focus) triggers the release phase — no stuck notes.","images":"attached"}
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{"command":"ls -lh index.html; grep -E \"http|cdn|https://\" index.html || echo \"no external refs\"; grep -n \"triggerAttack\\|triggerRelea-rw-r--r-- 1 node node 14K Nov 10 01:07 index.html no external refs 220: var synth = new Tone.PolySynth(Tone.Synth, { 251: await Tone.start(); 262: try { synth.triggerAttack(note); } catch (e) { console.warn(e); } 270: try { synth.triggerRelease(note); } catch (e) { console.warn(e); } 291: // pointerup anywhere releases pointer-held notes (covers release outside a key) 292: window.addEventListener("pointerup", function (e) { 311: // pointerup on window already covers that. Keep this no-op for slide-play friendliness. 332: if (e.repeat) return; // prevent auto-repeat duplicates 350: window.addEventListener("blur", releaseAll); 354: window.addEventListener("pointerup", function () { 355: // extra safety: stray pointerup clears pointer map
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Built `index.html` — a self-contained chromatic piano (C4–C5, 13 notes) using local `tone.min.js`: - **Keyboard layout:** 8 white + 5 correctly-placed black keys, absolutely-positioned blacks, visible note labels (C4…C5) + computer-key letter on every key, plus a mapping chip row. - **Synthesis:** `Tone.PolySynth(Tone.Synth)` with ADSR (`attack 0.005, decay 0.25, sustain 0.45, release 1.4`), supporting ≥3 simultaneous notes. No audio files. - **Input mapping:** `A W S E D F T G Y H U J K` → C4 C♯4 D4 D♯4 E4 F4 F♯4 G4 G♯4 A4 A♯4 B4 C5 via `keydown`/`keyup`; screen keys via `pointerdown`/`pointerup`. - **Anti-stuck:** `e.repeat` guard prevents duplicate voices, `active` Set dedupes `noteOn`, `window pointerup` releases pointer notes even outside a key, `window blur` + `visibilitychange` calls `releaseAll()`. Key highlight via `.active` class while held. - **Audio activation:** `Tone.start()` on first gesture; status pill switches from "Click a key…" to "Audio ready — play!"; active-notes readout shows held notes. **Verified:** - Inspected initial render via browser tool — all 13 keys labeled correctly, black-key placement correct, mapping chips visible. - Clicked C4 key — status changed to "Audio ready — play!", no new console errors after activation (only expected pre-gesture `AudioContext` warnings). - Pressed computer key `A` via browser key action — no console errors after audio activation. - Grepped handlers: matching `triggerAttack`/`triggerRelease`, `e.repeat` check, `pointerup`/`blur` release paths present; confirmed no external URLs/CDNs. **Unverified:** audible tone quality/polyphony (sandbox mutes audio, can't hear), sustained-highlight capture (browser actions are instant down+up so held state wasn't captured in a screenshot), and focus-loss release (code-inspected only).