PowerSync is a browser-based multitrack audio platform where users build personalized soundscapes using drag-and-drop binaural beats and ambient layers for focus, relaxation, or meditation. Under the hood it combines a modular Web Audio engine, a scalable Node.js + Prisma backend, and a PostgreSQL schema that persists 21-track session state in real time. Auth0-secured APIs, Stripe-powered subscriptions, and a responsive Next.js front end make it production-ready with a clear path toward collaborative mixing, mobile clients, and enterprise wellness deployments.