Binaural beats and healing frequencies, playing in seconds
A tone studio in your browser: tune a carrier, set the beat, add a bed of brown noise and a sleep timer. No app, no account, no audio files. Everything is synthesised live on your device.
Presets
Headphones on for binaural mode. Start with the volume low; you can always turn it up.
Plan a session for your evening
Describe what’s going on in a sentence. An AI assistant suggests settings, explains why, and loads them into the player. It won’t diagnose, and it’ll tell you when evidence is thin.
What the dial is actually doing
In binaural mode the studio plays two sine waves, one per ear. With a 200 Hz carrier and a 6 Hz beat, your left ear gets 197 Hz and your right ear 203 Hz. Your brainstem notices the 6 Hz mismatch and you hear a slow wobble that exists nowhere in the air. The scope shows it: the left channel moves the trace sideways, the right channel moves it up and down, and the ellipse rolls over once per beat.
The beat frequency is what gets matched to brainwave bands: around 2 Hz for delta, 6 Hz for theta, 10 Hz for alpha, 16 Hz for beta and 40 Hz for gamma. The carrier is just the pitch you hear. Keep it between roughly 100 and 500 Hz; binaural beats fade on high carriers.
Solfeggio frequencies
The full list and where it came from →Not solfeggio tones, but just as searched: 432 Hz tuning, the 40 Hz gamma research, the 7.83 Hz Schumann resonance and 111 Hz.
Noise, when tones are too much
Plenty of people sleep better with a hiss than a hum. The studio can lay noise under any beat, or play it alone: white for masking voices, pink for an even, rain-like wash, and brown for a deep rumble that swallows traffic.
Need a specific pitch instead? The tone generator goes from 1 Hz to 20 kHz with a sweep, for tuning or speaker checks, and the hearing test finds the highest pitch you can hear. Prefer to calm down without sound? The breathing pacer guides box, 4-7-8 and resonance breathing.
An honest note on evidence
Research on binaural beats is genuinely mixed. A 2023 systematic review (Ingendoh and colleagues, PLOS ONE) found some studies reporting brainwave entrainment and many finding none. Claims that 528 Hz repairs DNA, or that any tone cures illness, have no scientific support. What these sounds reliably offer is a steady, predictable backdrop that masks distractions and gives your attention somewhere to rest. That’s worth having; it’s just not medicine.
Questions people ask
Do I need headphones?
For binaural beats, yes: each ear must hear its own tone. Isochronic and monaural beats, pure tones and noise all work on speakers.
Is anything downloaded or uploaded?
No. Every sound is synthesised live in your browser with the Web Audio API. Nothing is streamed, and your settings stay on your device.
Do healing frequencies actually work?
Evidence is thin. Research on binaural beats is mixed, and specific “healing” frequencies such as 528 Hz have only small pilot studies. They can be a pleasant, calming sound. Each frequency page on this site says plainly what is and isn’t known.
Will it keep playing if I lock my phone?
Most browsers keep Web Audio running with the screen off if the tab stays open, but some phones pause background tabs to save battery. Keep the tab in front for long sleep sessions.
Is it safe?
At low volume, for most people, yes. Don’t listen while driving. If you have epilepsy, avoid pulsing (isochronic) sounds and ask your doctor first.