Drum machine · mimo-v2.5-pro
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
The user wants a 16-step drum machine with: - A clickable grid for kick, snare, hi-hat, and clap - All sounds synthesized with Web Audio API - Play/stop button - Adjustable BPM I'll create a self-contained index.html file with all CSS and JS inline. Let me design this carefully. For the drum sounds, I'll synthesize: - Kick: Low frequency oscillator with quick pitch sweep and volume envelope - Snare: White noise + oscillator with bandpass filter - Hi-hat: Filtered noise with very short envelope - Clap: Multiple short noise bursts with filtering Let me build this out.
/workspace/index.html (12481 bytes)Successfully wrote 12481 bytes to /workspace/index.html
thinking
The file has been written. Let me verify it exists.
The drum machine is built at `/workspace/index.html`. Here's what it includes: **Drum sounds (all Web Audio API synthesis):** - **Kick** – sine oscillator with pitch sweep from 150Hz→30Hz + gain envelope - **Snare** – noise burst through highpass filter + triangle oscillator body - **Hi-hat** – noise through highpass + bandpass filters (7kHz+) for metallic shimmer - **Clap** – 3 quick noise bursts spaced 15ms apart + filtered tail for realism **Controls:** - **Play / Stop** button toggles the sequencer - **Clear** button resets the entire grid - **BPM slider** (60–200, default 120) adjusts tempo in real time - **Spacebar** keyboard shortcut to toggle playback **Grid features:** - 16-step clickable grid with color-coded rows (kick = red, snare = orange, hi-hat = teal, clap = purple) - White playhead border highlights the current step - Active steps glow with their instrument's color - Clicking a cell toggles it and plays a preview of the sound - Beat group dividers every 4 steps for visual clarity
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 grid toggling, play/stop, BPM slider, and step highlight animation working as expected.
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.