Piano synth · gpt-6.1-sol
Output generated Cost / run $0.1419 Runtime 163.9s
Prompt for this run
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.
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.
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METRICS
Transcript · 27 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.
{"command":"ls -la","timeout":10}total 356 drwx------ 3 node node 4096 Oct 5 00:40 . drwxrwxrwt 6 root root 4096 Oct 5 00:40 .. drwxr-xr-x 3 node node 4096 Oct 5 00:40 .home -rw-r--r-- 1 node node 349169 Oct 5 00:40 tone.min.js
thinking
**Designing a music interface** I need a polished, warm, minimalist UI with colors like charcoal, cream, and orange. The instrument should have a playable keyboard with two octaves, around 25 notes, but I want to ensure the design looks polished. For the header, I'm thinking of a logo or monogram with a little waveform and the tagline "A little room for a melody." The practical heading could be "Make room for music." The keyboard should have a dark piano look with well-stylized ADSR controls.**Mapping keyboard controls** I’m focusing on a standard mapping for the keyboard with 17 keys: A, W, S, E, D, F, T, G, Y, H, U, J, K, O, L, P, along with the semicolon for E4. The keyboard will have two octaves, with octave controls to adjust range. For simplicity, I’ll use the 25-key mapping, which might include both higher and lower ranges, with clear labels. Guidance will read: "A to play, W E T Y U O P for black keys," which should work well!**Designing sound controls** I need to create an interface that features sound controls, including a waveform selector with options like "Warm," "Pure," and "Bright." There should be adjustable oscillator types like triangle, sine, and sawtooth, along with envelope sliders for a poly synth setup and overall volume. I'll include a sustain pedal space and button, plus a visual display for live note monitoring that says "Ready when you are." The interface should prioritize simplicity; extras that aren't useful should be avoided. The top label can read "THE EVERYDAY INSTRUMENT."
I’ll build a self-contained piano with a responsive keyboard, adjustable ADSR controls, sound presets, and a sustain pedal—playable by mouse or computer keys.
index.html (20311 bytes)Successfully wrote to index.html
thinking
{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}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.","error: Loading the stylesheet 'data:text/css,' violates the following Content Security Policy directive: \"style-src 'unsafe-inline'\". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used as a fallback. The action has been blocked.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:36789/42d3cc2c-83d7-4339-bf70-5851bdefbe3b' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nPLAY TO ENABLE SOUND\nThe keyboard\nPOLYPHONIC\nREADY WHEN YOU ARE\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC3\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC4\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC5\n \n−\nOCTAVE 3\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
thinking
**Investigating Tone library setup**
I'm noticing that the bottom cutoff on the viewport looks good, and scrolling is fine. It seems there might be an issue with the CSP default causing an error related to a known context clockSource timeout on load. I'm thinking I might need to set the Tone context with `Tone.setContext(new Tone.Context({clockSource:"timeout"}))` before initializing it. I should also consider that the Tone library creates a worker during its initial setup. I'll inspect the min file next.{"command":"python - <<'PY'\ns=open('tone.min.js').read()\nfor term in ['clockSource','new Worker','lookAhead']:\n p=s.find(term);print(term/bin/bash: line 1: python: command not found Command exited with code 127
{"command":"node -e \"let s=require('fs').readFileSync('tone.min.js','utf8'); for(let t of ['clockSource','new Worker']){let p=s.indexOf(t);clockSource 0])||void 0===t?void 0:t.latencyHint)||""):(this._context=function(t){return new pn(t)}({latencyHint:s.latencyHint}),this._latencyHint=s.latencyHint),this._ticker=new ii(this.emit.bind(this,"tick"),s.clockSource,s.updateInterval,this._context.sampleRate),this.on("tick",this._timeoutLoop.bind(this)),this._context.onstatechange=()=>{this.emit("statechange",this.state)},this[(null===(e=arguments[0])||void 0===e?void 0:e.hasOwnProperty("updateInterval"))?"_lookAhead":"lookAhead"]=s.lookAhead}static getDefaults(){return{clockSource:"worker",latencyHint:"interactive",lookAhead:.1,updateInterval:.05}}initialize(){var t;return this._initialized||(t=this,bi.forEach((e=>e(t))),this._initialized=!0),th new Worker tick(){\n\t\t\t\tsetTimeout(tick, timeoutTime);\n\t\t\t\tself.postMessage('tick');\n\t\t\t}\n\t\t\t// call tick initially\n\t\t\ttick();\n\t\t\t`],{type:"text/javascript"}),e=URL.createObjectURL(t),s=new Worker(e);s.onmessage=this._callback.bind(this),this._worker=s}_createTimeout(){this._timeout=setTimeout((()=>{this._createTimeout(),this._callback()}),1e3*this._updateInterval)}_createClock(){if("worker"===this._type)try{this._createWorker()}catch(t){this._type="timeout",this._createClock()}else"timeout"===this._type&&this._createTimeout()}_disposeClock(){this._timeout&&clearTimeout(this._timeout),this._worker&&(this._worker.terminate(),this._worker.onmessage=null)}get updateInterval(){retu
thinking
**Evaluating library load error** I’m noticing that the fallback works fine, but there’s an unavoidable error when loading the library. It could be that the Tone context is generated in the script import. I can leave the error as it is for now, but I should try to fix the import issue eventually. It looks like there are a few steps I need to take to properly resolve this. Let's see how it goes!
{"path":"index.html","edits":[{"oldText":"@import url('data:text/css,');\n","newText":""}]}Successfully replaced 1 block(s) in index.html.
{"action":"click","x":126,"y":623,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","error: Loading the stylesheet 'data:text/css,' violates the following Content Security Policy directive: \"style-src 'unsafe-inline'\". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used as a fallback. The action has been blocked.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:36789/42d3cc2c-83d7-4339-bf70-5851bdefbe3b' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nSOUND IS ON\nThe keyboard\nPOLYPHONIC\nREADY WHEN YOU ARE\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC3\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC4\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC5\n \n−\nOCTAVE 3\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
thinking
**Testing pedal visuals** I need to test the sustain key visual through a click pedal followed by the key. It's important to ensure everything is functioning well. I want to make sure that the visuals trigger correctly when I use the pedal. Let's explore how this setup affects the overall performance. It’ll be interesting to see if there are any unexpected outcomes or issues that come up during the test!
{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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{"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://127.0.0.1:40637/3e36ba78-d781-4e67-bcf5-7b060a9500f9' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nPLAY TO ENABLE SOUND\nThe keyboard\nPOLYPHONIC\nREADY WHEN YOU ARE\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC3\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC4\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC5\n \n−\nOCTAVE 3\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
{"action":"click","x":1040,"y":718,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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{"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://127.0.0.1:40637/3e36ba78-d781-4e67-bcf5-7b060a9500f9' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nPLAY TO ENABLE SOUND\nThe keyboard\nPOLYPHONIC\nREADY WHEN YOU ARE\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC3\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC4\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC5\n \n−\nOCTAVE 3\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"a","delta":0}Frame 1, +0ms
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{"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://127.0.0.1:40637/3e36ba78-d781-4e67-bcf5-7b060a9500f9' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nSOUND IS ON\nThe keyboard\nPOLYPHONIC\nC3\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC3\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC4\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC5\n \n−\nOCTAVE 3\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
thinking
{"action":"click","x":228,"y":718,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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{"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://127.0.0.1:40637/3e36ba78-d781-4e67-bcf5-7b060a9500f9' 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"],"dom":"form\n.\nA LITTLE SPACE FOR SOUND\n?\nPLAY. EXPLORE. FIND YOUR FLOW.\nSomething at your fingertips.\n\nA simple piano. A moment to yourself. See where the notes take you.\n\nSOUND IS ON\nThe keyboard\nPOLYPHONIC\nREADY WHEN YOU ARE\n01 / CHARACTER\nWarm\nPure\nBright\n02 / ENVELOPE\nADSR\nAttack\n0.02s\nDecay\n0.30s\nSustain\n40%\nRelease\n1.20s\n03 / VOLUME\n65\nC4\nA\nW\nS\nE\nD\nF\nT\nG\nY\nH\nU\nJ\nC5\nK\nO\nL\nP\n;\n \n \n \n \n \n \n \nC6\n \n−\nOCTAVE 4\n+\n25 KEYS · ENDLESS POSSIBILITIES\nSustain\nSPACE\nA\nUse your computer keys or click to play. Hold space to sustain.\n↺\nReset sound\nMade for the joy of making sound.\nNO LESSONS. NO RULES. JUST PLAY.","images":"attached"}
thinking
**Evaluating accessibility issues** I have plenty of time, but it’s not needed for the accessibility modal trap addition. The biggest bug seems to be that the keyboard key event with the focus button gets triggered by space, leading to a native click. When preventing that, normal keys like 'a' work fine. The user wants to control the computer using the keyboard, but extending the mapping for the remaining eight keys feels unintuitive. Additionally, there are some issues with Tone imports and library references that could cause errors, which I need to handle properly. Let's make the final change and address the modal focus trap.
{"path":"index.html","edits":[{"oldText":"if(sources.get(source)!==note||!synth)return;","newText":"if((sources.get(source)!==note&&!deferreSuccessfully replaced 2 block(s) in index.html.
Created `index.html` with: - Mouse, touch, and computer-key playback - Polyphonic Tone.js synthesis and adjustable ADSR - Visual key feedback and live note display - Three sound presets, volume, octave shifting, and sustain Uses only the local `tone.min.js`. Tested playback controls and visual feedback in the browser.