Drum machine · hy3
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 sounds: kick, snare, hi-hat, and clap 2. All sounds synthesized with Web Audio API (no samples) 3. Play/stop controls 4. Adjustable BPM 5. Single self-contained index.html file with inline CSS and JS 6. No external resources I need to create: - HTML structure with a grid (4 rows x 16 columns) - CSS for styling the grid and controls - JavaScript with: - Web Audio API sound synthesis for each drum sound - Sequencer logic (16 steps, 4 tracks) - Play/stop functionality - BPM control - Grid interaction (clicking to toggle steps) Let me design the sound synthesis: - Kick: low frequency oscillator with pitch envelope - Snare: noise + tuned oscillator - Hi-hat: high-frequency noise with highpass filter - Clap: filtered noise with envelope I'll create a complete, self-contained HTML file.
I'll build a complete 16-step drum machine with synthesized sounds using Web Audio API. Let me create the self-contained index.html file.
/workspace/index.html (14694 bytes)Successfully wrote 14694 bytes to /workspace/index.html
thinking
The user asked me to build a 16-step drum machine with specific features: 1. Clickable grid for kick, snare, hi-hat, and clap 2. All sounds synthesized with Web Audio API 3. Play/stop controls 4. Adjustable BPM I've created the complete index.html file with: - A visually appealing dark theme UI with gradient background - 4 tracks (kick, snare, hi-hat, clap) each with 16 steps - Clickable grid where users can toggle steps on/off - Play/Stop buttons with visual feedback - BPM slider (60-180 BPM range) - Web Audio API synthesis for all 4 drum sounds: - Kick: Low frequency oscillator with pitch envelope - Snare: Combination of noise (highpass filtered) and tonal oscillator - Hi-hat: Highpass filtered noise - Clap: Multiple short noise bursts with bandpass filter - Current step highlighting - Active step visualization - Keyboard shortcut (spacebar) to toggle play/stop - Sound preview when clicking steps The file is self-contained with all CSS and JS inline, no external resources. Let me verify the file was created successfully
I've created a complete 16-step drum machine in `/workspace/index.html`. Here's what it includes: **Features:** - **4 tracks**: Kick, Snare, Hi-Hat, and Clap - **16-step grid** with clickable steps to toggle patterns - **Web Audio API synthesis** for all sounds (no samples): - Kick: Low oscillator with pitch envelope - Snare: Noise + tonal oscillator combination - Hi-Hat: Highpass-filtered noise - Clap: Multiple noise bursts with bandpass filter - **Play/Stop controls** with visual feedback - **BPM slider** (60-180 BPM) with real-time adjustment - **Current step highlighting** during playback - **Sound preview** when clicking steps - **Spacebar shortcut** to toggle play/stop **Design:** - Dark gradient theme with vibrant accent colors - Responsive grid layout with visual step grouping (every 4 steps) - Glowing effects on active/current steps - Smooth hover and click animations The app is fully self-contained with no external dependencies - just open `index.html` in a browser to 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 grid, play/stop, and BPM slider; play triggers step highlighting via Enter/Space and arrows, but click/drag/wheel show no visible change.
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.