Arpeggiator pad · claude-sonnet-5.5
Output generated Cost / run $0.2106 Runtime 69.1s
Prompt for this run
Using the pre-provided tone.min.js (global Tone), build a clickable pentatonic pad grid that triggers a synth voice with reverb, plus a play/stop button that runs an arpeggiator sequence at an adjustable tempo. All sound synthesized, no audio files.
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 · 29 messages
Using the pre-provided tone.min.js (global Tone), build a clickable pentatonic pad grid that triggers a synth voice with reverb, plus a play/stop button that runs an arpeggiator sequence at an adjustable tempo. All sound synthesized, no audio files.
{"command":"ls -la; head -c 300 tone.min.js"}total 356 drwx------ 3 node node 4096 Oct 5 05:19 . drwxrwxrwt 6 root root 4096 Oct 5 05:19 .. drwxr-xr-x 3 node node 4096 Oct 5 05:19 .home -rw-r--r-- 1 node node 349169 Oct 5 05:19 tone.min.js /*! For license information please see Tone.js.LICENSE.txt */ !function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.Tone=e():t.Tone=e()}("undefined"!=typeof self?self:this,(()=>(()=>{var
thinking
I'm planning a compact 5x4 grid laid out with C minor pentatonic across four octave rows, with the arpeggiator stepping through the chosen pattern and highlighting active pads. For reverb, I need to remember that Tone.Reverb requires calling generate and awaiting readiness before use.
{"command":"cat > index.html <<'E'\n<!doctype html><html><head><meta charset=\"utf-8\"><title>Pentatonic Pads</title>\n<style>\nbody{margin:{"action":"inspect"}(no output)
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://127.0.0.1:41601/76eb7423-6def-4cf0-bd3c-a61ee5538f61' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
thinking
The CSP block might be hitting Tone's Ticker, which uses a worker internally but should fall back to setTimeout if that fails. Let me just test clicking to see what actually happens.
{"action":"click","x":408,"y":330}{"action":"click","x":285,"y":601}{"action":"inspect"}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://127.0.0.1:41601/76eb7423-6def-4cf0-bd3c-a61ee5538f61' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady.","images":"attached"}
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://127.0.0.1:41601/76eb7423-6def-4cf0-bd3c-a61ee5538f61' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady.","images":"attached"}
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://127.0.0.1:41601/76eb7423-6def-4cf0-bd3c-a61ee5538f61' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady.","images":"attached"}
thinking
The layout shifted slightly but that's fine, and the pad click worked correctly. The arp highlight isn't showing up though — possibly a transport timing issue or Tone.js falling back from its worker-based ticker to setTimeout; I should test this with some motion to confirm.
{"action":"motion"}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://127.0.0.1:41601/76eb7423-6def-4cf0-bd3c-a61ee5538f61' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady.","images":"attached"}
thinking
The arpeggiator isn't flashing, so I suspect the transport isn't advancing—maybe Tone's worker-based ticker is being blocked or the audio context is suspended in a headless environment. Since I can't eval directly in the browser tool, I'll add debug output showing Transport.seconds and look into forcing Tone to use a setTimeout-based ticker instead of the worker.
{"command":"sed -i 's|<script src=\"tone.min.js\"></script>|&\\n<script>try{Tone.setContext(new Tone.Context({clockSource:\"timeout\",latenc{"action":"reload"}{"action":"click","x":285,"y":601}{"action":"motion"}(no output)
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://127.0.0.1:44325/b32b0d9a-ac9c-43e6-93b4-b80cb1363b52' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
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://127.0.0.1:44325/b32b0d9a-ac9c-43e6-93b4-b80cb1363b52' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
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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://127.0.0.1:44325/b32b0d9a-ac9c-43e6-93b4-b80cb1363b52' 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","error: Failed to execute 'connect' on 'AudioNode': cannot connect to an AudioNode belonging to a different audio context."],"dom":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
thinking
My context swap attempt caused an audio context mismatch error since Destination was tied to the old context, so I should revert that hack. The original setup actually worked fine—the worker CSP error is harmless since Tone falls back gracefully, and the lack of visible flashes was probably just a timing coincidence between frame captures and flash intervals. I'll revert the hack and confirm things work by checking the transport time in the status text.
{"command":"sed -i '/setContext/d' index.html; grep -c setContext index.html"}{"action":"reload"}{"action":"click","x":285,"y":601}{"action":"inspect"}0 Command exited with code 1
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://127.0.0.1:45965/6c560b68-dc78-4fcf-a33d-7df77b3ce1f0' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
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://127.0.0.1:45965/6c560b68-dc78-4fcf-a33d-7df77b3ce1f0' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady. Audio: running","images":"attached"}
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://127.0.0.1:45965/6c560b68-dc78-4fcf-a33d-7df77b3ce1f0' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady. Audio: running","images":"attached"}
thinking
The status still reads "Ready" without the timer updating, which is odd since the interval should be ticking every 300ms while running is true. I suspect the browser sandbox is throttling timers, or maybe there's a silent exception preventing the update loop from executing. Actually, I bet this is about Tone's Transport clock relying on a Worker-based ticker that's blocked by CSP (worker-src none), so it never ticks past the initial scheduled event at time zero. I should try setting the context's clockSource to "timeout" instead of relying on the worker, before starting anything.
{"command":"sed -i 's|^const scale=|try{Tone.getContext().clockSource=\"timeout\"}catch(e){console.log(e)}\\nconst scale=|' index.html; grep{"action":"reload"}{"action":"click","x":285,"y":601}{"action":"motion"}25:try{Tone.getContext().clockSource="timeout"}catch(e){console.log(e)}
Frame 1, +1ms
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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://127.0.0.1:38813/9ac12525-b5e5-4b93-9e35-9393b05da4a3' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n▶ Play\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nClick pads to play. Loading audio…","images":"attached"}
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://127.0.0.1:38813/9ac12525-b5e5-4b93-9e35-9393b05da4a3' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nReady. Audio: running","images":"attached"}
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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://127.0.0.1:38813/9ac12525-b5e5-4b93-9e35-9393b05da4a3' 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":"Pentatonic Pads\nC5\nD#5\nF5\nG5\nA#5\nC4\nD#4\nF4\nG4\nA#4\nC3\nD#3\nF3\nG3\nA#3\nC2\nD#2\nF2\nG2\nA#2\n■ Stop\nTempo 110 BPM\nPattern \nup\ndown\nup-down\nrandom\nReverb \nAudio: running t=1.8","images":"attached"}
`/tmp/job-Zi3gmo/index.html` is built and working. I couldn't hear the audio in the test browser. I checked it by clicking and watching the pads light up. - **Pads:** a 5×4 grid of C-minor pentatonic notes (C, D#, F, G, A#) over octaves 2–5. Clicking a pad plays a note on a triangle-wave `PolySynth`. The synth runs through a Tone.js `Reverb`, and a slider sets how much reverb you hear. - **Arpeggiator:** the Play/Stop button starts an eighth-note loop that walks up through all 20 pads from the lowest, lighting each pad as it plays. A tempo slider (60–200 BPM) changes speed live, and a pattern dropdown offers up, down, up-down and random. - **Tested:** - **Pad click:** the C4 pad lit up. - **Play:** the arpeggio stepped up through the pads and the transport clock advanced. - **Not tested:** I didn't try the tempo slider, pattern dropdown or reverb slider. - **Console:** there is one sandbox error about Tone.js creating a worker, which the browser blocks. The page works anyway. - **Clock timing:** the page switches Tone.js to a timer-based clock, because the blocked worker would otherwise stop the arpeggio from running. Audio starts on your first click, since browsers require a user gesture before playing sound. Everything is synthesized, with no audio files or network requests.