Drum machine · kat-coder-pro-v2
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.
I'll create a fully functional drum machine with synthesized sounds using the Web Audio API. This will include a 16-step sequencer grid for kick, snare, hi-hat, and clap sounds, with play/stop controls and adjustable BPM.
/workspace/index.html (18558 bytes)Successfully wrote 18558 bytes to /workspace/index.html
I've created a complete 16-step drum machine with the following features: **Instruments:** - Kick, Snare, Hi-Hat, Clap - all synthesized with Web Audio API **Controls:** - Play/Stop buttons - Clear pattern button - Adjustable BPM (60-200) with default 120 **Grid:** - 16-step sequencer with clickable cells - Visual feedback for active steps and current playback position - Each instrument row has distinct colors - Step numbers with beat markers (every 4th step) **Sound Synthesis:** - Kick: Low frequency oscillator with pitch envelope - Snare: Noise with highpass filter + tone oscillator - Hi-Hat: High-frequency noise with highpass filter - Clap: Multiple short noise bursts with bandpass filters **User Experience:** - Smooth animations and hover effects - Current step indicator - Keyboard shortcut (Space) for play/stop - Responsive design - Modern gradient UI with glassmorphism effect The drum machine is fully functional and self-contained in a single HTML file. Just open it in a browser and start making beats!
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 machine with kick/snare/hihat/clap grid, play/stop/clear, BPM control, clicking toggles steps and playback advances.
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.