Here is a brief but hopefully useful list of resources that were integral in creating Aizen Projection.
A programmable audio generator intended as an aural aid to meditation, implementing the binaural beat principle as described in Gerald Oster's Oct. 1973 Scientific American article "Auditory Beats in the Brain."
Open-source software that generates binaural tones in real-time according to a 24-hour programmed sequence read from a file. It can also be used to play a sequence on demand, rather than according to the clock, or to write a WAV file for playing later. Pink noise, MP3 and Ogg files may also be mixed with the binaural beats to provide background sounds.
Tom Campbell began researching altered states of consciousness with Bob Monroe at Monroe Laboratories in the early 1970s where he and a few others were instrumental in getting Monroe’s laboratory for the study of consciousness up and running. He has a tutorial on creating binaural beats here.