Drum machine · glm-4.7-flash
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 using Web Audio API (no external audio files) 3. Play/stop functionality 4. Adjustable BPM I'll create a single HTML file with: - CSS in a style tag for the UI - JavaScript in a script tag for the Web Audio API logic - Inline everything (no external resources) Let me plan the structure: - Header with title - BPM display and slider - Play/stop button - 16 steps x 4 tracks grid - Color coding for each drum sound For the audio synthesis: - Kick: Sine wave with frequency sweep from high to low - Snare: White noise burst with brief envelope - Hi-hat: High-pass filtered white noise with short envelope - Clap: Multiple noise bursts with decay I'll use the Web Audio API to create oscillators and noise buffers.
I'll create a complete 16-step drum machine with synthesized sounds, play/stop controls, and adjustable BPM.
/workspace/index.html (16287 bytes)Successfully wrote 16287 bytes to /workspace/index.html
thinking
I've created a complete 16-step drum machine with all the requested features. Let me summarize what I built: 1. **Sound Synthesis**: All four drum sounds are synthesized using the Web Audio API: - Kick: Sine wave with frequency sweep from 150Hz to 50Hz - Snare: Combination of white noise (high-pass filtered) and a triangle tone - Hi-hat: High-pass filtered white noise with very short decay - Clap: Bandpass filtered white noise with decay 2. **Clickable Grid**: 16 steps × 4 tracks (kick, snare, hi-hat, clap) - Each pad can be toggled on/off by clicking - Visual feedback with opacity and active states 3. **Play/Stop Controls**: Button to start and stop the sequencer 4. **Adjustable BPM**: Slider that changes from 60-180 BPM, which updates the step timing in real-time 5. **Visual Features**: - Gradient backgrounds for each drum type - Active state highlighting when pads are clicked - Current step indicator when playing - Responsive design The file is self-contained with all CSS in a style tag and JavaScript in a script tag, using no external resources.
I've created a complete 16-step drum machine in `index.html`. Here's what it includes: **Features:** - **4 Drum Sounds** synthesized with Web Audio API: - Kick: Sine wave with frequency sweep (150Hz → 50Hz) - Snare: White noise burst + triangle tone - Hi-hat: High-pass filtered noise - Clap: Bandpass filtered noise bursts - **16x4 Clickable Grid**: Toggle patterns by clicking pads - **Play/Stop Button**: Start and stop the sequencer - **Adjustable BPM**: Slider from 60-180 BPM with real-time updates **Visual Design:** - Gradient backgrounds for each drum type - Active state highlighting when triggered - Current step indicator bar - Responsive layout that works on different screen sizes All audio is synthesized locally - no external files or network requests needed. Just open the file 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 grid with kick/snare/hihat/clap rows, BPM slider, play button; click toggled a clap cell, other inputs had no effect.
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.