The brainwave layer adds a gentle pulse under the mix. Binaural beats play a slightly different tone in each ear: the brain hears the difference as a slow pulse. They need headphones. Isochronic tones switch one tone on and off at a steady rate and play fine on speakers.
The journey editor draws how that pulse changes over the session. The carrier tone underneath follows the selected frequency range: lower settings sound darker, while higher settings sound brighter.
The tones are an optional sound layer: a rhythmic atmosphere you can shape to taste or leave out entirely.