Drum machine · glm-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 me to build a 16-step drum machine with: 1. A clickable grid for 4 drum sounds: kick, snare, hi-hat, and clap 2. All sounds synthesized using Web Audio API (no samples) 3. Play/stop controls 4. Adjustable BPM Let me create a self-contained HTML file with: - CSS for styling the grid and controls - JavaScript for: - Web Audio API synthesis for each drum sound - Step sequencer logic - UI interaction (clicking cells to toggle) - Play/stop functionality - BPM control I'll make it visually appealing with a clear grid layout, active step indication, and proper styling.
/workspace/index.html (19932 bytes)Successfully wrote 19932 bytes to /workspace/index.html
thinking
I've created a complete 16-step drum machine. Let me verify the file was created correctly.
I've built a complete 16-step drum machine in `/workspace/index.html`. Here's what it includes: **Features:** - **4 drum sounds** synthesized with Web Audio API: - **Kick** - Sine wave with pitch drop + click attack - **Snare** - Filtered noise + triangle wave body - **Hi-Hat** - High-pass filtered noise for metallic sound - **Clap** - Multiple short noise bursts + tone body - **16-step grid** with clickable cells to toggle beats on/off - **Play/Stop button** with visual state indication (red when stopped, green when playing) - **BPM slider** adjustable from 60-200 BPM - **Visual beat indicator** showing current step position - **Beat markers** every 4 steps for visual grouping **Interactions:** - Click any cell to toggle it and hear a preview of that sound - Press **Spacebar** to toggle play/stop - Drag the BPM slider to adjust tempo in real-time **Design:** - Dark gradient background with glassmorphism container - Color-coded drum rows (pink kick, orange snare, cyan hi-hat, purple clap) - Glowing active cells and white border on current step - Responsive layout
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 rows, play/stop toggles via Enter/Space, arrows move step highlight, BPM slider present.
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.