Sleep session · A14
Deep Body Calming
Moves from SMR to Infra-Low — 13 Hz easing to 0.3 Hz over 13 minutes.
Choose the full transition or begin at the advertised audio target. You can scrub and extend either path in the player.
Frequency journey
How the rhythmic pulse embedded in the sound changes from the opening moments to its destination.
The embedded pulse gradually slows from 13 Hz (SMR) to 0.3 Hz (Infra-Low), so its rhythmic emphasis becomes less rapid over the ramp. The authored target begins at 13 min and holds for 17 min.
Wind-down and sleep preparation
For a sleep routine, the sound is designed to become easier to leave in the background as the session develops.
Give the transition room
Bedtime routines, quiet rest, and moving away from active listening. Start quietly and let the ramp unfold instead of judging the session in its first minute. The target then holds for 17 min by design. You can also start directly at the target, scrub the journey, or extend the hold in the player.
Signal, not a scan. The line shows the modulation rate generated in the audio. It is not an EEG reading and does not promise that brain activity will follow the curve. Listening responses vary.
Signal specification
Every audible behavior is published. The values below describe the sound engine—not a biological dose or guaranteed effect.
Journey
- Beat start
- 13 Hz SMR
- Beat target
- 0.3 Hz Infra-Low
- Ramp
- 13 min
- Session length
- 30 minutes
Sound field
- Carrier
- 109 Hz
- Modulation
- Isochronic
- Modulation depth
- 0.96
- Envelope
- Sigmoidal
- Duty cycle
- 50% on
- Noise field
- Deep Brownian
- Spatial orbit
- 0.01 Hz one turn every 100s
Playback
- Delivery
- Isochronic or Monaural
- Listening setup
- Headphones — the 109 Hz carrier is below what most speakers reproduce
Choose the spatial feel
This session starts in isochronic mode. You can change how the beat is delivered without changing the frequency journey, or add a Shepard-Risset carrier drift for a continuously falling timbre.
- Monaural
- Two tones summed before they reach you, so the beat exists in the air rather than being built in your head. Smoother and less percussive than isochronic, and it works on speakers.
New to these terms? Every row above, explained in plain language.
How this one is built
Long, slow descents built on low carriers and deep brownian noise, ending anywhere from delta down into the infra-low range depending on the session. The gentlest envelopes in the catalog, so nothing in the signal asks for your attention.
Listen responsibly
Brainwavest is a wellness and relaxation tool, not a medical device. Session names and guidance describe design intent, not a promised physiological result. This session runs on a 109 Hz carrier, below what a phone or laptop speaker reproduces — use headphones or it will sound almost silent. Start quietly, and never use rhythmic audio while driving. Read the full safety notes.