Drum machine · glm-4.6
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 · 4 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
I need to create a single-page drum machine web app with the following requirements: 1. 16-step sequencer grid 2. 4 instruments: kick, snare, hi-hat, clap 3. Synthesized sounds using Web Audio API 4. Play/stop functionality 5. Adjustable BPM 6. All self-contained in one HTML file Let me design this step by step: 1. Create a grid interface (16 steps x 4 instruments) 2. Implement Web Audio API synthesis for each drum sound 3. Add sequencer logic to step through the pattern 4. Add play/stop controls 5. Add BPM control 6. Style it nicely with CSS I'll use a modern, clean design with visual feedback for the current playing step.
/tmp/ws/index.html (22816 bytes)Successfully wrote 22816 bytes to /tmp/ws/index.html
thinking
Perfect! I've created a fully functional 16-step drum machine web app with all the requested features: 1. **16-step grid sequencer** - Visual grid with 16 steps for each instrument 2. **4 instruments** - Kick, Snare, Hi-hat, and Clap, each with their own color scheme 3. **Web Audio API synthesis** - All sounds are synthesized programmatically: - Kick: Sine wave oscillator with pitch sweep - Snare: Noise burst with tone - Hi-hat: High-pass filtered noise - Clap: Two filtered noise bursts for realistic clap sound 4. **Play/Stop controls** - Play button that becomes Pause when playing, plus Stop button 5. **Adjustable BPM** - Range from 60-200 BPM with real-time updates 6. **Additional features**: - Clear button to reset the pattern - Default beat pattern loaded on start - Visual feedback with current step highlighting - Responsive design for mobile - Smooth animations and transitions - Modern gradient design The app is completely self-contained in a single HTML file with no external dependencies, ready to run in any modern browser with Web Audio API support.
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
Drum machine grid renders with kick/snare/hihat/clap patterns and play/stop/BPM controls; playhead advances but layout is cramped and step 13-16 row misaligned.
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.