Update: see
this post for the audio.
via
this auction

"Ultra-rare private pressing, the first promotional recording produced by Moog, given out to prospective customers to demonstrate the capabilities of their amazing products. Both sides are identical and contain a wonderful montage of Moog-sourced sound effects and short original compositions created especially for this record by Wendy Carlos, ranging widely from experimental to classical to pop to ambient soundscapes and a real treat for collectors of her work. It is narrated by Ed Stokes who explains the different types of waves and filters available, the basics of sound synthesis, and Moog innovations like voltage control. This extremely hard to find record is an awesome artifact of early electronic music history and a gem for Moog
and Wendy Carlos fans.
Wendy Carlos studied under Vladimir Ussachevsky and Otto Luening at the Columbia-Princeton Electronic Music Center, worked with Robert Moog to develop and popularize the synthesizer and pioneer its performance techniques, and scored films for Stanley Kubrick and Disney. Some additional points of reference for this synth demo record: Jean-Michel Jarre, Paul Beaver, Bernie Krause, Stereolab, Aphex Twin, Autechre, Mu-Ziq, Matmos, Dick Hyman, Raymond Scott, Bruce Haack, Pierre Henry, Tomita, Vangelis, Jean-Jacques Perrey, Gershon Kingsley, Tom Dissevelt, Ondioline, Theremin, Clara Rockmore, Arp, Donald Buchla, Chappell Recorded Music Library, De Wolfe, Montparnasse 2000, Patchwork, Piero Umiliani, Roger Roger, Cecil Leuter, DJ Premier, DJ Shadow, Invisibl Skratch Piklz, Oskar Sala, trautonium, Morton Subotnick, John Eaton, Donald Erb, Bernard Parmegiani, Mort Garson..."