Deep Focus · ready
Dmaj9
Sound spectrum. The shaded band, 200 Hz to 1 kHz, is the only part that pulses. The rest of the sound stays steady.
25:00Press play or Space
Session length
Focus music made live in your browser. It never repeats, and it pulses gently in the range brain.fm uses.
Sound spectrum. The shaded band, 200 Hz to 1 kHz, is the only part that pulses. The rest of the sound stays steady.
The 200 Hz–1 kHz range gets louder and softer 16 times a second, in step with the beat (32nd notes at 120 BPM). These numbers come from brain.fm's own 2024 study. In it, 16 Hz at medium strength helped listeners with attention trouble most.
Each piano voice repeats on its own clock, a few seconds to half a minute apart, so the pattern never lines up the same way twice. This is Brian Eno's tape-loop idea, borrowed from Generative.fm's open-source Eno Machine. Chords drift slowly through one key.
The noise bed and session timer follow Moodist, an open-source ambient sound app. When a session ends, a soft bell plays and the music fades out.
The study found a modest effect, mostly in people with ADHD symptoms. Steady music with no surprises does most of the work. Everything here is made in your browser: no samples and no network calls.