My Hemi-Sync® Metamusic® album Remembrance was truly innovative:
The first METAMUSIC® to combine theta and beta waves (Remembrance by J. S. Epperson) was released in 1994 (Bullard 2003). A second METAMUSIC piece combining theta and beta waves, released that same year (Einstein’s Dream, also by Epperson), was based on a modification of Mozart’s Sonata for Two Pianos in D Major, the same piece used in the initial study which produced the controversial Mozart effect. This version, however, had embedded combinations of sounds to encourage whole-brain coherence.
Bennet PhD, Alex and Bennet PhD, David (2009) The Human Knowledge System: Music and Brain Coherence, Hemi-Sync® Journal, Vol. I, Nos 3 & 4, Summer-Fall 2009, https://www.monroeinstitute.org/article/3357