Gleam Theremin

A browser-based theremin instrument built with Gleam compiled to JavaScript.

Move your mouse to play. No install, no server — open index.html.

The oscilloscope in the center shows the live waveform.

git clone <repo-url>
cd gleam-theremin
python3 -m http.server 8080
# open http://localhost:8080

Must be served over HTTP — browsers block ES modules on file://.

# requires Gleam: https://gleam.run/getting-started/installing/
gleam build --target javascript
gleam test --target javascript

• Gleam — compiled to JS, handles all logic
• WebAudio API — OscillatorNode → AnalyserNode → GainNode → output
• Canvas 2D API — cursor glow + oscilloscope visualization
• No frameworks, no bundler, no dependencies beyond Gleam stdlib