Arpeggiator pad · muse-ember
Output generated Cost / run $0.0121 Runtime 48.6s
Prompt for this run
Build a pentatonic synthesizer pad grid and arpeggiator 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: - Show ten labeled pads for two octaves of a C-major pentatonic scale. Clicking a pad plays its note through a synthesized voice with reverb and visibly marks the active pad. - Provide a separate sequence-selection toggle for each pad. Start with a nonempty selection. The arpeggiator repeatedly plays selected notes in ascending pitch order, one note per eighth-note step. - Provide Play, Stop, and a tempo control from 60 to 180 BPM. Tempo and selection changes take effect during playback. An empty selection produces no new notes. - Activate audio through a user gesture. Stop prevents new arpeggiator notes, allowing existing release and reverb tails to decay. Repeated Play must not create overlapping schedulers. - Synthesize every sound; do not load audio files. Verify: Click a pad and check its active feedback. Start the arpeggiator, change one selected note and the tempo, and check that the visible sequence responds. Stop playback and inspect the console for audio-initialization or scheduling errors.
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 · 25 messages
Build a pentatonic synthesizer pad grid and arpeggiator 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: - Show ten labeled pads for two octaves of a C-major pentatonic scale. Clicking a pad plays its note through a synthesized voice with reverb and visibly marks the active pad. - Provide a separate sequence-selection toggle for each pad. Start with a nonempty selection. The arpeggiator repeatedly plays selected notes in ascending pitch order, one note per eighth-note step. - Provide Play, Stop, and a tempo control from 60 to 180 BPM. Tempo and selection changes take effect during playback. An empty selection produces no new notes. - Activate audio through a user gesture. Stop prevents new arpeggiator notes, allowing existing release and reverb tails to decay. Repeated Play must not create overlapping schedulers. - Synthesize every sound; do not load audio files. Verify: Click a pad and check its active feedback. Start the arpeggiator, change one selected note and the tempo, and check that the visible sequence responds. Stop playback and inspect the console for audio-initialization or scheduling errors.
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{"command":"ls -la; ls -lh tone.min.js 2>&1 | head"}total 356 drwx------ 3 node node 4096 Nov 10 01:04 . drwxrwxrwt 8 root root 4096 Nov 10 01:04 .. drwxr-xr-x 3 node node 4096 Nov 10 01:04 .home -rw-r--r-- 1 node node 349169 Nov 10 01:04 tone.min.js -rw-r--r-- 1 node node 341K Nov 10 01:04 tone.min.js
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Evaluating Tone PolySynth with reverb routing and optional delay while keeping the setup simple.
{"command":"grep -o '\"version\":\"[^\"]*\"' tone.min.js | head -1; head -c 500 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 t={382:function(t,e,s){!function(t,e,s,n){"use strict";function i(t){return t&&"object"==typeof t&&"default"in t?t:{default:t}}var o=i(e),r=i(s),a=i(n),c=function(t,e,s){return{endTime:e,insertTime:s
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index.html (13846 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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n120 BPM\nStopped\nStep: —\nSelected (4): C4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n○ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.","images":"attached"}
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{"action":"click","x":187,"y":296}Frame 1, +0ms
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{"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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n120 BPM\nStopped\nStep: —\nSelected (4): C4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n○ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\nPad: C4 ▶","images":"attached"}
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{"action":"click","x":155,"y":166}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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n120 BPM\nPlaying\nStep: —\nSelected (4): C4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n○ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\n▶ Arpeggiator playing at 120 BPM (8th notes)","images":"attached"}
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{"action":"motion"}Frame 1, +0ms
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Frame 2, +618ms
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Frame 3, +1184ms
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Frame 4, +1749ms
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{"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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n120 BPM\nPlaying\nStep: C4 (#1)\nSelected (4): C4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n○ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\n▶ Arpeggiator playing at 120 BPM (8th notes)","images":"attached"}
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{"action":"click","x":394,"y":398}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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n120 BPM\nPlaying\nStep: E4 (#2)\nSelected (5): C4 · D4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n✓ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\nD4 added to sequence","images":"attached"}
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{"action":"drag","x":520,"y":166,"toX":640,"toY":166}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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n180 BPM\nPlaying\nStep: C5 (#5)\nSelected (5): C4 · D4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n✓ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\nTempo: 180 BPM (live)","images":"attached"}
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{"action":"click","x":266,"y":166}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"],"dom":"🎹 Pentatonic Pad Grid & Arpeggiator\n\nC-major pentatonic · two octaves · C D E G A — synthesized live with Tone.js, no samples\n\n▶ Play\n■ Stop\nTEMPO\n180 BPM\nStopped\nStep: —\nSelected (5): C4 · D4 · E4 · G4 · C5\nC4\n261.6 Hz\n✓ SEQ\nD4\n293.7 Hz\n✓ SEQ\nE4\n329.6 Hz\n✓ SEQ\nG4\n392.0 Hz\n✓ SEQ\nA4\n440.0 Hz\n○ SEQ\nC5\n523.3 Hz\n✓ SEQ\nD5\n587.3 Hz\n○ SEQ\nE5\n659.3 Hz\n○ SEQ\nG5\n784.0 Hz\n○ SEQ\nA5\n880.0 Hz\n○ SEQ\n\nPad = play that note now · SEQ toggle = include note in the arpeggio (ascending, one per 8th-note) · Tempo & selection changes apply live while playing. Stop lets reverb/release tails decay.\n\n■ Stopped — release / reverb tails decaying","images":"attached"}
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{"command":"ls -lh index.html tone.min.js"}-rw-r--r-- 1 node node 14K Nov 10 01:04 index.html -rw-r--r-- 1 node node 341K Nov 10 01:04 tone.min.js
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Built `index.html` — a self-contained pentatonic pad grid & arpeggiator using local `tone.min.js` (no CDNs/samples). **Implementation:** - 10 labeled pads: C4 D4 E4 G4 A4 C5 D5 E5 G5 A5 (2 octaves C-major pentatonic) with frequencies, color-coded. Click plays via `Tone.PolySynth(Tone.Synth)` → `Tone.Reverb` → Destination, with `.active` flash. - Separate `SEQ` toggle per pad (`aria-pressed`), starting with C4/E4/G4/C5 selected. Arpeggiator uses a single `Transport.scheduleRepeat("8n")` stepping selected notes ascending. - Play/Stop + tempo slider 60–180 BPM. Tempo sets `Transport.bpm` live (`rampTo` + value); selection index is clamped live. Empty selection returns without triggering notes. - Audio via `Tone.start()` on Play/pad gesture (synth/reverb created once). Stop calls `Transport.stop()` only — no disposal/silence, so release/reverb tails decay. Repeated Play guarded by `isPlaying` + single `seqId` scheduler. **Checked in browser:** - Initial render: 10 pads, 4 selected, console clean except pre-gesture autoplay warnings. - Clicked C4 pad: active white-border flash + “Pad: C4 ▶” log. - Play: status Playing, motion frames show arp cycling C4→E4→G4→C5 with current-step highlight/step text. - During playback, toggled D4 SEQ: selection updated live to 5 notes (C4·D4·E4·G4·C5); dragged tempo to 180 BPM: displayed “180 BPM (live)” and playback continued. - Stop: status Stopped, step cleared, tails-decaying log, no console errors. **Unverified:** audible tone quality/volume (sandbox has no audio output check), empty-selection silence over a full cycle, and rapid Play/Stop/Play scheduler count (guarded in code but not stress-tested in the brief pass).