# Coro

- **Event:** [Gemini 3 NYC Hackathon](https://cerebralvalley.ai/e/gemini-3-nyc-hackathon)
- **When:** Sat, Feb 28 at 9:00 AM – 9:00 PM (EST)
- **Where:** The Malin Flatiron, New York, NY
- **Placement:** Finalist
- **Team:** [Rahil Singhi](https://cerebralvalley.ai/u/rahil), [Sariya Rizwan](https://cerebralvalley.ai/u/sariyarizwan), [Chinmay Shringi](https://cerebralvalley.ai/u/asdf), [Bharath Mahesh Gera](https://cerebralvalley.ai/u/Gera2001)
- **GitHub:** https://github.com/rahilsinghi/Coro
- **Demo video:** https://youtu.be/w06d-U7hLWM
- **Gallery:** https://cerebralvalley.ai/e/gemini-3-nyc-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/gemini-3-nyc-hackathon/hackathon/gallery/42

CORO is a real-time collaborative music engine that turns any audience into a live orchestra. Audience members join a room via QR code, pick a musical role (Drummer, Vibe Setter, Genre DJ, or Instrumentalist), and their collective inputs are synthesized by Google Gemini 2.5 into evolving musical prompts,  which Google Lyria then renders as a continuous, never-repeating audio stream. Features include a coordinated "Drop Button" (majority vote triggers a bass drop), a microphone-powered Applause Meter that dynamically shapes the music's energy, and a real-time Musical Timeline showing the crowd's influence on the evolving composition. Built with FastAPI, React, and WebSockets for sub-second latency across up to 10 simultaneous participants.

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Markdown version of https://cerebralvalley.ai/e/gemini-3-nyc-hackathon/hackathon/gallery/42. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt