Welcome. MuZenCosmos is run by one person who makes healing tracks alongside a day job. The tracks are on YouTube; this site holds what was measured while making them, and what research does and does not show.
Five promises
- No promised effects. We do not write that a sound will make you sleep or heal you. Sound is presented as a tool for marking the end of a day or a block of work.
- Research is checked before it is cited. Papers are verified on PubMed or at the source, with a DOI link. Claims we could not verify are removed, and we say so.
- First-hand information from the maker. Measurements of our own tracks, mistakes and fixes are published as production notes.
- Unknowns are called unknowns. No study so far shows an effect specific to a particular frequency, and each article says so.
- Errors are corrected, and the correction is kept. When an article is rewritten, it says what changed and why.
First, play the sounds
- Frequency Lab: the nine Solfeggio tones, 432 Hz against 440 Hz, and binaural beats, playable in the browser. Free, no sign-up.
- Hearing age test: find out how high you can hear (not a medical test).
A reading order
- What are the Solfeggio frequencies?: the nine tones, where the numbers came from, and the state of research.
- Is there science behind 528 Hz?: what the papers do and do not show about the most famous frequency.
- 528 Hz vs 432 Hz: two different kinds of thing, by arithmetic and measurement.
- How-to: how to use binaural beats and Sun Salutation.
- Production notes: the catalogue that was not loudness-matched, measuring the spectra of 528 Hz tracks, rebuilding a track published clipped.
If you suspect none of this works
That suspicion is where this site starts. What research has not confirmed is written as unconfirmed, and only what the maker measured in their own tracks is written as fact. If you finish reading and still like spending time with quiet sound, that is enough.
Listen
The tracks are on YouTube at MuZenCosmos, from 8-hour sleep tracks to 20-minute focus pieces. How to use them: The 30 Minutes Before Sleep and How to Set a Safe Volume (coming 12 Nov).
If something is wrong
- If sleeplessness or any symptom persists, see a doctor rather than relying on sound. This site is not a substitute for medical care (disclaimer).
- If you spot an error, or want a study checked, tell us through the contact page. We will check and correct.
- Who runs the site and the full editorial policy: About.