Show HN: Audio Player with "Binaural Beats" tuned to the same key as your music

Binaural Studio is a browser-based audio player that automatically analyzes music to generate binaural beats tuned to the same key as each track, creating immersive headphone sessions. The tool combines a binaural synthesizer with separate decks for music and spoken-word audio, offering features like real-time key/BPM analysis, adaptive sound layers, and the ability to record complete mixes. It's entirely local-first with no backend, account requirements, or installation needed.