Sleep session · 0114
N3 Delta Descent
Moves from Delta to Infra-Low — 1.5 Hz easing to 0.5 Hz over 10 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 1.5 Hz (Delta) to 0.5 Hz (Infra-Low), so its rhythmic emphasis becomes less rapid over the ramp. The authored target begins at 10 min and holds for 18 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 18 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
- 1.5 Hz Delta
- Beat target
- 0.5 Hz Infra-Low
- Ramp
- 10 min
- Session length
- 28 minutes
Sound field
- Carrier
- 88 Hz
- Modulation
- Isochronic
- Modulation depth
- 0.96
- Envelope
- Smooth bell
- Duty cycle
- 50% on
- Noise field
- Sub Pink
- Spatial orbit
- 0.008 Hz one turn every 125s
Playback
- Delivery
- Isochronic, Monaural or Poly-rhythmic
- Listening setup
- Headphones — the 88 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.
- Poly-rhythmic— needs stereo headphones
- Each ear gets its own carrier and its own beat, related by the golden ratio rather than driven in lockstep. Needs headphones — on a speaker the two channels sum and the distinction is lost.
New to these terms? Every row above, explained in plain language.
How this one is built
Follows the shape of an ultradian cycle — descending and rising beats in sequence rather than a single ramp, moving between deep and light stages across the session.
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 88 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.