Found this brief documentary last night called "What the Future Sounded Like". https://www.youtube.com/watch?v=8KkW8Ul7Q1IIt may suck to some folks, but I think it has that "Forbidden Planet" sound going for most of it [[the kind 4FR used to emulatehttps://www.youtube.com/watch?v=jYwF1sRzdBA). If one were to like that, there's also the triple CD release, OHM: Early Gurus of Electronic Music,https://en.wikipedia.org/wiki/Ohm:_T...ectronic_Music that has pieces similar to that [[and some dipping into ambiance and drone). My favorite is from [[of all folks, cartoon soundtrack composer-) Raymond "Powerhouse" Scott https://www.youtube.com/watch?v=80XEEpqBra0.