meditation Theta band
Theta Gateway - Deep Meditation
4.5 Hz beat · 396 Hz carrier · 5 phases · 45 min · advanced
Forty-five minutes, five phases, and the slowest theta rate in the catalogue. Marked advanced because the length and the depth both ask something of you.
The beat and carrier in the heading are the main phase — the part of the session it was built around. They are not what plays for the whole length. Every programme here opens in the alpha band, wherever it is going afterwards, and most come back up before they finish. The full phase plan is on this page, and it is the honest picture of what you would actually hear.
Hear it
Thirty seconds rendered at the parameters of the phase named above — not an excerpt cut from a finished file, because sessions are built to order and yours does not exist yet. The figures the player draws are computed from the audio or from plate mathematics; none of them is a measurement of your hearing.
What this actually is
Four and a half hertz is near the floor of theta, one step above the delta boundary. Slow enough that it stops feeling like a rhythm and starts feeling like the sound moving.
Theta runs from four to eight hertz. It is the band most of this catalogue sits in, and the one where the published literature is least thin — the reviewed trials on procedural anxiety cluster here.
The full phase plan
Five phases across forty-five minutes, and it takes fifteen of them to arrive. Ten hertz, then six and a half, then twenty minutes at four and a half, then seven, then ten to land. Two phases down and two phases back, which is what the advanced marking is really about — it is a long way in and a long way out.
| Phase | Role | When | Beat | Band | Carrier |
|---|---|---|---|---|---|
| Preparation | induction | 0–8 min | 10 Hz | Alpha | 432 Hz |
| Descent | deepening | 8–15 min | 6.5 Hz | Theta | 396 Hz |
| Deep Theta | main | 15–35 min | 4.5 Hz | Theta | 396 Hz |
| Integration | transition | 35–40 min | 7 Hz | Theta | 417 Hz |
| Grounded Return | emergence | 40–45 min | 10 Hz | Alpha | 256 Hz |
Where the 396 Hz carrier comes from
Solfeggio. The first tone of the classic six, sung as UT, associated in the tradition with releasing fear.
A twentieth-century assignment to a medieval hymn tone. The hymn is documented; the hertz value is a later addition and is not a historical measurement.
The carrier is the pitch you actually hear. The binaural difference — the part that makes this a structured session rather than a tone — lives between the two channels and is set by the beat, not by the carrier. Choosing one carrier over another is a tonal choice, the way picking a key is a tonal choice. It is not a functional one.
What this does not claim
Gateway is a word from the wider tradition of this material, used here to describe a shape. It is not a door, there is nothing on the other side of it that we are offering, and nothing here is an altered-state technique.
Who it is for
An established practice and a free afternoon. Start with the thirty-minute session if neither of those is true yet.
Nothing here is for sale yet. These are the starting points a session can be built from, published so you can see the whole range before anything is priced.