Vintage Bob Monroe Footage: Hemi Sync and Binaural Beats Explained This is rare vintage footage of Robert Monroe, one of the early pioneers behind an audio method called Hemi Sync, short for hemispheric synchronization. It uses carefully designed stereo tones (often discussed alongside binaural beats) to help guide the brain into specific relaxed or focused states to achieve an out-of-body experience or, as some people call it AP which is short for Astral Projection. “Hemi Sync” is a label Monro