Arpeggiator pad · qwen3.5-35b-a3b

Output generated Cost / run $0.0049 Runtime 48.3s

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.

⛨ sandboxed Open in new tab ↗

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

modelqwen3.5-35b-a3b

vendorQwen

harnesspi 0.87.1 · browser iteration

generated2026-10-16

METRICS

runtime48.3s

tokens in15k

tokens out5.2k

cached0

cost / run$0.0049

Transcript · 9 messages

system

user

assistant

thinking

The user wants me to build a pentatonic synthesizer pad grid and arpeggiator using Tone.js. Let me break down the requirements:

1. **Ten labeled pads** for two octaves of C-major pentatonic scale (C4, D4, E4, G4, A4, C5, D5, E5, G5, A5)
2. **Clicking a pad** plays its note through a synthesized voice with reverb and visibly marks the active pad
3. **Sequence-selection toggle** for each pad - start with a nonempty selection
4. **Arpeggiator** plays selected notes in ascending pitch order, one note per eighth-note step
5. **Play, Stop, and tempo control** from 60 to 180 BPM
6. **Tempo and selection changes take effect** during playback
7. **Empty selection produces no new notes**
8. **Activate audio through user gesture** (first click/touch)
9. **Stop prevents new arpeggiator notes**, allowing existing release and reverb tails to decay
10. **Repeated Play must not create overlapping schedulers**
11. **Synthesize every sound** - no audio files

Let me check what files exist in the current directory first.

→ bash {"command":"ls -la /tmp/job-MGJCW9/"}

toolResult

total 356 drwx------ 3 node node 4096 Oct 16 01:25 . drwxrwxrwt 6 root root 4096 Oct 16 01:25 .. drwxr-xr-x 3 node node 4096 Oct 16 01:25 .home -rw-r--r-- 1 node node 349169 Oct 16 01:25 tone.min.js

assistant

thinking

Good, I can see the tone.min.js file exists. Now I'll create the complete index.html file with the pentatonic synthesizer pad grid and arpeggiator.

→ write /tmp/job-MGJCW9/index.html (16793 bytes)

toolResult

Successfully wrote to /tmp/job-MGJCW9/index.html

assistant

thinking

Now let me open the file in the browser to verify it works correctly.

→ browser {"action":"screenshot"}

toolResult

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://127.0.0.1:35267/1b350bcd-4ce5-4496-88c4-d370830c7242' 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","log: Pentatonic synthesizer initialized. Click any pad to start audio.","log: Initial selected notes: C4, D4, E4, G4, A4, C5, D5, E5, G5, A5"],"dom":"Pentatonic Synthesizer\n\nC Major Pentatonic (2 octaves) - C4 to A5\n\nPlay\nStop\nTempo:\n120\nC4\nD4\nE4\nG4\nA4\nC5\nD5\nE5\nG5\nA5\n\nAudio not initialized - click any pad to start\n\nCurrent Sequence:\nC4\nD4\nE4\nG4\nA4\nC5\nD5\nE5\nG5\nA5","images":"attached"}

assistant

thinking

The basic structure is in place. I can see the pads are displayed but some are missing labels (showing as "C4", "D4", etc. which is good), and the sequence selection is working. However, there are some issues to fix based on the requirements:

1. The error about the worker is related to Tone.js - I need to configure it properly
2. Need to ensure the arpeggiator plays notes in ascending pitch order
3. Need to verify the play/stop functionality properly
4. Need to fix the tempo control to work from 60-180 BPM
5. Need to ensure pad clicks work to activate audio

Let me examine what was written and then fix the issues.

I see the app is loaded but there are some issues to fix. Let me rewrite the complete implementation with proper Tone.js integration: <read> <file>index.html</file> </read>