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 10 harmonic carrier pairs, seven brainwave-state presets, per-harmonic mixing (so binaural tones aren't out-of-tune with music), adjustable beat and carrier frequencies, two oscillator shapes, offline key/BPM analysis, automatic carrier matching, adaptive impulse noise, playlist support, and output recording.

The main problem with existing generators is that tones don't remain in-tune with what you're listening to, ruining both the beat and the music. That's the issue this solves. Some might remember i-Doser, which introduced me to binaural beats—two different tones in each ear that the brain scrambles into a single frequency, meant to induce states like deep focus or meditation. I haven't decided if it's real science or placebo, but it works for me.

I love ambient music and think audiobooks could borrow from ambient ideas, hence the second deck for spoken-word files. There's ASMR-y impulse noise too. I'd like to build this into a fully-featured "ambient spoken word" DJ software inspired by Glenn Gould's *The Idea of North*. Playlist function lets you predefine binaural tones against future tracks.

It's open-source, free, no backend or account needed. Runs in-browser via GitHub Pages or locally. Feedback and feature requests welcome.