Drum machine · grok-4.3
Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.
transcript · 8 messages
Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.
thinking
The task is: "Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM. Write it ALL in...The task is to build a 16-step drum machine using Web Audio API, all in one index.html file, no external resources. I need: - Grid: 4 rows (instruments: kick, snare, hi-hat, clap), 16 columns (steps). - Clickable: toggle pattern for each instrument 16 steps. - Play/Stop button. - Adjustable BPM (e.g., slider 60-200). - All sounds synthesized with Web Audio API. - Self-contained, runs sandboxed. - CSS in <style>, JS in <script>, inline. - End with index.html present in current dir /workspace.
{"command":"ls -la /workspace"}total 4 drwxrwxrwx 2 node node 64 Jul 22 16:54 . drwxr-xr-x 1 root root 4096 Jul 22 16:54 ..
thinking
The directory is empty. I need to create index.html with a self-contained 16-step drum machine. The task is to build a 16-step drum machine using Web Audio API, all in a single HTML file with inline CSS and JS. It needs a clickable grid for kick, snare, hi-hat, clap, play/stop, and adjustable BPM.
/workspace/index.html (21120 bytes)Successfully wrote 21120 bytes to /workspace/index.html
thinking
The file has been written successfully.
{"command":"ls -la /workspace && wc -l /workspace/index.html"}total 28 drwxrwxrwx 3 node node 96 Jul 22 16:55 . drwxr-xr-x 1 root root 4096 Jul 22 16:54 .. -rw-r--r-- 1 node node 21130 Jul 22 16:55 index.html 664 /workspace/index.html
thinking
The self-contained index.html file has been successfully created with a complete 16-step drum machine implementation. All requirements are met:
Done! `index.html` is ready — a fully self-contained 16-step drum machine with: - Clickable 4×16 grid (kick/snare/hi-hat/clap) - Web Audio API synthesized sounds (kick, snare, hi-hat, clap) - Play/pause toggle + Stop - BPM slider (60–200) that adjusts in real-time while playing - Step highlighting + keyboard shortcuts (Space / S)
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
EVALUATION
16-step drum grid with kick/snare/hihat/clap, play/pause/stop, BPM slider, and playhead advances on space/enter and arrows.
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.