GATEWAY OR HEMI SYNC
The audio-guidance process works through the generation of complex, multilayered audio signals
Signals act together to create a resonance that is reflected in unique brain wave forms characteristic of specific states of consciousness. The result is a focused, whole-brain state known as hemispheric synchronization, or Hemi-Sync, where the left and right hemispheres are working together in a state of coherence. Different Hemi-Sync signals are used to facilitate deep relaxation, focused attention or other desired states. As an analogy, lasers produce focused, coherent light. Hemi-Sync produces a focused, coherent mind, which is an optimal condition for improving human performance.
I would not “experiment” with astral travel unless I have a complete understanding of what its effects might be.