Drum machine · qwen3-coder

I'll build a 16-step drum machine with synthesized sounds using the Web Audio API. Let me create a self-contained HTML file with all the necessary CSS and JavaScript.

I've successfully created a 16-step drum machine with the following features: 1. **Four drum tracks** (kick, snare, hi-hat, and clap) with 16 steps each 2. **Web Audio API synthesis** for all sounds (no external samples): - Kick: Sub-bass synthesized with frequency decay - Snare: Noise burst with filtering and oscillator - Hi-Hat: High-pass filtered noise - Clap: Bandpass filtered noise bursts 3. **Interactive grid** where you can click steps to activate/deactivate them 4. **Transport controls**: - Play/Pause button - Stop button - Adjustable BPM (40-240) with real-time update 5. **Visual feedback**: - Current step highlighting - Visualizer bars that respond to playback - Track-specific color coding 6. **Responsive design** that works on different screen sizes The drum machine is completely self-contained in a single HTML file with no external dependencies. All sounds are synthesized in real-time using the Web Audio API. To use it: 1. Click on the steps to create your rhythm pattern 2. Adjust the BPM using the input field 3. Press "Play" to start the sequencer 4. Press "Stop" to stop playback The interface features a modern dark theme with gradient accents and visual feedback for the currently playing step. The visualizer responds to the audio playback with animated bars. Would you like me to explain any specific part of the implementation in more detail?