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Arpeggiator pad · mistral-medium-3.1

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.

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user

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.

assistant
write index.html (16812 bytes)
toolResult

Successfully wrote 16812 bytes to index.html

assistant
edit index.html (869 bytes)
toolResult

Validation failed for tool "edit": - edits: must have required properties edits Received arguments: { "path": "index.html", "content": " changeScale(e.target.dataset.scale);\n }\n });\n \n // Pattern selector buttons\n patternSelector.addEventListener('click', (e) => {\n if (e.target.classList.contains('pattern-btn')) {\n changePattern(e.target.dataset.pattern);\n }\n });\n \n // Initialize everything\n initPadGrid();\n \n // Start Tone.js audio context when user interacts with the page\n document.addEventListener('click', () => {\n if (Tone.context.state !== 'running') {\n Tone.start().then(() => {\n console.log('Audio context started');\n });\n }\n }, { once: true });\n });\n </script>\n</body>\n</html>" }

assistant
edit {"path":"index.html","edits":[{"oldText":" changeScale(e.target","newText":" changeScale(e.target.data
toolResult

Successfully replaced 1 block(s) in index.html.

assistant
bash {"command":"ls -l index.html"}
toolResult

-rw-r--r--. 1 node node 17641 Aug 1 19:42 index.html

assistant

The self-contained `index.html` file is now complete. It includes: 1. **Pentatonic Pad Grid**: - 5×5 grid of clickable/touchable pads - Each pad triggers a synth note from the selected pentatonic scale - Visual feedback when pressed (color change + scale animation) - Supports 5 pentatonic scales (Major, Minor, Egyptian, Blues, Japanese) 2. **Arpeggiator Controls**: - Play/Stop button to toggle the arpeggiator - Adjustable tempo slider (40-200 BPM) - 5 arpeggio patterns (Up, Down, Up & Down, Random, Chord) 3. **Audio Engine**: - Uses Tone.js for all sound synthesis (no external audio files) - Polyphonic synth with reverb effect - Notes trigger with attack/release envelopes 4. **UI/UX**: - Fully responsive design - Mobile-friendly (touch support) - Visual feedback for all interactive elements - Auto-starts audio context on first interaction The app is completely self-contained with all CSS in `<style>` and JS in `<script>` tags, and loads `tone.min.js` locally. No network requests are made after initial load.

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

modelmistral-medium-3.1
vendorMistral AI
harnesspi-agent
generated2026-08-01

EVALUATION

4/5 working

Pentatonic pad grid with scale/pattern controls, tempo slider, and Play button responds visibly to click and Enter/Space with pad highlighting.

Vision grade · anthropic/claude-sonnet-5

MEASUREMENTS

Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.

idle motion0.0%
on click0.8%
on drag0.8%
on wheel0.8%
on enter + space17.0%
on arrow keys0.0%
on w/a/s/d0.0%
frame spread20.6 / 255
console errors0
js errors none

METRICS

runtime41.4s
tokens in26k
tokens out4.8k
cached24k
cost / run$0.0112