Show HN: Beatsync – perfect audio sync across multiple devices

Summary

Beatsync Beatsync is a high-precision web audio player built for multi-device playback. beatsync-demo.mov Features Millisecond-accurate synchronization : Abstracts NTP-inspired time synchronization primitives to achieve a high degree of accuracy : Abstracts NTP-inspired time synchronization primitives to achieve a high degree of accuracy Cross-platform : Works on any device with a modern browser (Chrome recommended for best performance) : Works on any device with a modern browser (Chrome recommended for best performance) Spatial audio: Allows controlling device volumes through a virtual listening source for interesting sonic effects Allows controlling device volumes through a virtual listening source for interesting sonic effects Polished interface : Smooth loading states, status indicators, and all UI elements come built-in : Smooth loading states, status indicators, and all UI elements come built-in Self-hostable: Run your own instance with a few commands Warning Beatsync is in early development. Currently, only desktop Chrome browsers are fully supported. Mobile device synchronization is experimental and may be unstable. Quickstart This project uses Turborepo. Fill in the .env file in apps/client with the following: NEXT_PUBLIC_API_URL=http://localhost:8080 NEXT_PUBLIC_WS_URL=ws://localhost:8080/ws Run the following commands to start the server and client: bun install # installs once for all workspaces bun dev # starts both client (:3000) and server (:8080)