Drum machine · glm-5

Output generated Cost / run $0.0128 Runtime 76.6s

Prompt for this run

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.

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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

modelglm-5

vendorZ.ai · GLM

harnesspi-agent

generated2026-07-22

METRICS

runtime76.6s

tokens in7.8k

tokens out5.0k

cached2.9k

cost / run$0.0128

Transcript · 4 messages

user

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.

assistant

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.

→ write /workspace/index.html (19932 bytes)

toolResult

Successfully wrote 19932 bytes to /workspace/index.html

assistant

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