Hi HN, Gabriel here. This is a standalone binaural beat generator, combined with a two-deck local audio player built with the Web Audio API. It includes ten harmonic carrier pairs,…

A local-first browser studio for building long-form headphone sessions from binaural tones, music, adaptive textures, and spoken-word audio. Binaural Studio combines a ten-voice binaural synthesizer with a local music deck, an independent spoken-word deck for audiobooks and other long-form audio, and a real-time master recorder. It can analyse your music in the browser, tune the generated layer to each track, move between state presets during a set, and record the complete result as one audio file. There is no backend, account, build step, or audio upload. Use stereo headphones and start at a comfortable volume. The state presets are creative sound-design tools, not medical treatments. You can also use the synthesizer on its own: choose a preset, put on headphones, and press play without loading any files. Open http://localhost:4173 in a modern browser. A local server is recommended instead of opening index.html directly. Recording becomes available after every Deck 01 track has been analysed. The main transport pauses and resumes both decks together. This keeps spoken-word playback intelligible and predictable without letting it retune or reshape the music-driven layers. For a reliable key estimate, the studio selects the analysed root or fifth in a low carrier range and glides there during transitions. Low-confidence results leave the previous carrier in place. These are lightweight musical heuristics, not studio-grade key or loudness measurements, so unusual or harmonically ambiguous material may need manual adjustment.