Piano synth · qwen3.5-35b-a3b
Output generated Cost / run $0.0065 Runtime 51.6s
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 · 13 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
The user wants me to build a playable piano keyboard using Tone.js. Let me break down the requirements: 1. Display one chromatic octave from C4 through C5 (13 notes: C4, C#4, D4, D#4, E4, F4, F#4, G4, G#4, A4, A#4, B4, C5) 2. Map computer keys A W S E D F T G Y H U J K to these 13 notes 3. Use a synthesized voice with ADSR envelope 4. Support at least 3 simultaneous notes 5. Highlight keys while held 6. Prevent keyboard auto-repeat from creating duplicate voices 7. Release voices when pointer released outside key or window loses focus 8. Activate audio through a user gesture 9. Display computer-key mapping 10. Use tone.min.js which is already present in the current directory Let me first check what's in the current directory to see if tone.min.js exists.
{"command":"ls -la /tmp/job-vIwbaI/"}total 356 drwx------ 3 node node 4096 Oct 16 01:23 . drwxrwxrwt 6 root root 4096 Oct 16 01:23 .. drwxr-xr-x 3 node node 4096 Oct 16 01:23 .home -rw-r--r-- 1 node node 349169 Oct 16 01:23 tone.min.js
thinking
Good, tone.min.js exists. Now I'll create the index.html file with all the required functionality: 1. One chromatic octave from C4 to C5 (13 notes) 2. Key mapping: A W S E D F T G Y H U J K to C4, C#4, D4, D#4, E4, F4, F#4, G4, G#4, A4, A#4, B4, C5 3. ADSR envelope with tone.js Synthesizer 4. Support 3+ simultaneous notes (polyphony) 5. Highlight keys while held 6. Prevent keyboard auto-repeat issues 7. Release on pointer out or window blur 8. Audio activation via user gesture 9. Display key mapping Let me write the complete index.html file:
I'll create a complete piano keyboard application with all the required features.
/tmp/job-vIwbaI/index.html (20322 bytes)Successfully wrote to /tmp/job-vIwbaI/index.html
thinking
Now let me verify the file was created correctly and then open it in the browser to test the functionality.
Now let me verify the file and open it in the browser to test the functionality:
{"command":"ls -la /tmp/job-vIwbaI/"}total 376 drwx------ 3 node node 4096 Oct 16 01:24 . drwxrwxrwt 6 root root 4096 Oct 16 01:23 .. drwxr-xr-x 3 node node 4096 Oct 16 01:23 .home -rw-r--r-- 1 node node 20332 Oct 16 01:24 index.html -rw-r--r-- 1 node node 349169 Oct 16 01:23 tone.min.js
thinking
Good, the file is created. Now let me open it in the browser to test the functionality.
{"command":"file /tmp/job-vIwbaI/index.html"}/bin/bash: line 1: file: command not found Command exited with code 127
thinking
Let me just open the file in the browser to test it.
{"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://127.0.0.1:39619/b114f22b-5dce-4c83-a6d4-92aebfc87f3b' 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","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","log: Piano initialized. Click \"Activate Audio\" to start."],"dom":"🎹 Play Piano\n\nChromatic Octave C4 - C5\n\n🔊 Audio not activated yet\nClick to Activate Audio\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\n📋 How to Play\n\nClick the \"Activate Audio\" button to start the audio engine. Then use your keyboard or mouse to play the piano!\n\nKeyboard Mapping: Press the keys shown on the piano to play notes. White keys are labeled with letters, black keys show their keyboard shortcut.\n\nPress and hold a key to play a note\nRelease the key to stop the note (with natural release)\nUp to 3 notes can play simultaneously (polyphony)\nNotes will release when you release the mouse outside a key or press Escape\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\nCurrent active voices: 0 / 3","images":"attached"}
thinking
The application is loaded and functional. I can see the piano display with: 1. Audio activation button 2. White keys labeled with notes (C4, D4, E4, etc.) and keyboard shortcuts (A, S, D, etc.) 3. Black key (A#4) visible with its keyboard mapping (U) 4. Instructions on how to play The console shows the Tone.js library loaded. Let me read the file to verify the implementation is correct, then test it:
The application loaded successfully! Let me read the file to verify the implementation and test the functionality: