# Nanas Sound

- **Event:** [Built with Opus 4.6: a Claude Code hackathon](https://cerebralvalley.ai/e/claude-code-hackathon)
- **When:** Feb 10 at 12:00 PM – Feb 17 at 10:00 AM (EST)
- **Where:** Location TBA
- **Placement:** Finalist
- **Team:** [Asep Bagja Priandana](https://cerebralvalley.ai/u/nanas)
- **GitHub:** https://github.com/nanassound/conductr
- **Demo video:** https://www.youtube.com/watch?v=X6CqJoyj0kI
- **Gallery:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery/5

Conductr is a browser-based MIDI instrument where you play and Claude Opus 4.6 directs the band. Four tracks of drums, bass, melody, and harmony generate in real time through a C engine compiled to WebAssembly, outputting MIDI to any DAW or synth.

The system operates on three timescales. The C engine generates notes every 15ms using Euclidean rhythms, walking bass, and random-walk melodies. A performance analyzer extracts features from your playing. Opus 4.6 receives that summary and reshapes the arrangement. The engine never waits for the AI, so latency is musically invisible.

Speak or type commands like "make it funky" and Opus translates musical intent into parameter changes. A fallback director keeps the instrument working without the API. About 4,800 lines of code, no frameworks.

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Markdown version of https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery/5. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt