Free tool
The focus sound mixer
Brown noise is a deep, steady sound with more energy in the low frequencies than white noise — closer to rumble than hiss. This free mixer runs in your browser and layers it with soft rain and an optional 40 Hz tone: no app, no account, press play and get to work.
The binaural layer sends a slightly different tone to each ear — it only works with headphones, one channel per ear. Keep the volume comfortable. This is a relaxation aid, not a medical device; research on gamma-frequency audio is early and mixed. If you have a seizure disorder or other health concerns, check with a professional first.
How to use it, the ritual way
- One sound
- Pick a mix and keep it. The point is a steady signal that says "we work now" — not a playlist to fiddle with.
- One task
- Write a single sentence describing what you'll do before you press play. Not a list. A sentence.
- One block
- Pair it with the focus timer — 25 or 50 minutes, then a real break.
Prefer a ready-made daily routine?
Explore Genius Switch
The seller describes a seven-minute audio routine. Our review covers the advertised offer and the details to check before buying.
Independent affiliate review; we have not personally tested the paid audio. This browser mix is not a Genius Switch sample.
Prefer longer music you can hear first? Preview our own Focus Kit — 8 offline MP3 tracks, €15 once, sold separately through Gumroad.