What differentiates the Gateway Experience from forms of meditation is its use of the Hemi-Sync technique which is defined in a monograph by Monroe Institute trainer Melissa Jager as, “a state of consciousness defined when the EEG patterns of both hemispheres are simultaneously equal in amplitude and frequency.”
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The Jonestown Death Tape (FBI No. Q 042) (archive.org)An audio recording made on November 18, 1978, at the Peoples Temple compound in Jonestown, Guyana immediately preceding and during the mass suicide and murder of over 900 members of the cult.