Explore
The sounds, frequencies and brainwave audio behind Simply Hypnotic — what they are, how we use them in our music, and different ways you can listen.
We write these notes plainly. Where research is genuinely unsettled, we say so, and we make no claims about treating or curing anything.
A set of seven tones with a long history in music and folklore. We use them because listeners ask for them, and because they make for distinctive, settled music.
396Hz
The lowest of the Solfeggio tones, often chosen for grounding, settling listening.
1 recording
417Hz
A low, warm tone people tend to reach for when they want to clear their head.
1 recording
528Hz
The best known of the Solfeggio tones, and the one most often asked for.
2 recordings
639Hz
A mid-range tone commonly associated with connection and openness.
1 recording
741Hz
A brighter tone, usually chosen for waking hours rather than sleep.
2 recordings
852Hz
High and clear; often used in stiller, more reflective listening.
1 recording
963Hz
The highest of the Solfeggio set, light in character.
2 recordings
Tunings outside the Solfeggio set that appear across our catalogue, including alternative concert pitches.
432Hz
An alternative concert tuning, preferred by some listeners for its softer feel.
2 recordings
444Hz
A tuning sometimes used alongside 528Hz work.
1 recording
777Hz
A high tone that appears in more contemporary frequency music.
1 recording
888Hz
A bright, high tuning used in the same tradition.
2 recordings
1111Hz
One of the highest tunings we work with, used sparingly.
1 recording
Audio built around the rhythms measured in brainwave research, including binaural beats. Best heard with headphones.
Delta
The slowest band, associated with deep sleep. Usually used in night-time audio.
4 recordings
Theta
Associated with drowsy, dreamlike states and deep relaxation.
3 recordings
Alpha
Associated with calm, restful wakefulness — eyes closed, mind quiet.
5 recordings
Beta
Associated with alert, everyday attention. Used in daytime and focus audio.
No recordings yet
Gamma
The fastest band, and the least settled area of research.
2 recordings
Binaural Beats
Two slightly different tones, one in each ear. Headphones are needed.
1 recording
Every idea here appears somewhere in the catalogue. You can browse the collections or read more in the Journal.