Drum machine · kimi-k2.5
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 as a single HTML file. Requirements: - 16-step sequencer grid - 4 instruments: Kick, Snare, Hi-hat, Clap - Clickable grid to toggle steps on/off - Synthesized sounds using Web Audio API (no samples) - Play/Stop controls - Adjustable BPM slider/input Plan: 1. Create HTML structure with a grid (4 rows x 16 columns) 2. Style with CSS for a nice dark theme, sequencer look 3. Implement Web Audio API synthesizers: - Kick: Sine wave with exponential frequency ramp - Snare: Noise burst + triangle wave - Hi-hat: High-pass filtered noise, very short decay - Clap: Bandpass filtered noise with multiple bursts or envelope to simulate clap reverb tail 4. Sequencer logic: - Current step indicator - Scheduling using AudioContext time for accuracy - Loop through 16 steps 5. Controls: - Play/Stop button - BPM slider (60-180 BPM range) I'll create a single index.html file with everything inline.
/workspace/index.html (21887 bytes)Successfully wrote 21887 bytes to /workspace/index.html
thinking
The drum machine has been created successfully. Let me verify the file exists and provide a summary.
I've created a complete 16-step drum machine in `/workspace/index.html`. Here's what it includes: **Features:** - **4 Instruments**: Kick (sine wave with pitch drop), Snare (noise + triangle snap), Hi-hat (bandpass filtered square waves), Clap (bandpass filtered noise with multi-burst envelope) - **16-Step Grid**: Click any step to toggle it on/off (cyan when active) - **Playback**: Current step highlighted in yellow with smooth visual feedback - **BPM Control**: Adjustable from 60-180 BPM via slider - **Default Pattern**: Pre-loaded with a basic beat to get started **How to use:** 1. Open `index.html` in a browser 2. Click **Play** to start the sequencer 3. Click any step in the grid to toggle sounds on/off 4. Adjust the tempo with the BPM slider 5. Click **Stop** to pause All sounds are synthesized in real-time using the Web Audio API - no external samples or network requests required.
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 grid with kick/snare/hihat/clap toggles, click added a step, PLAY animates step highlight.
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.