Enjoy this 1967 flexi disc of "Electronic Sounds and Effects for Electronic Music"

This flexi disc was bundled into the October 1967 issue of Practical Electronics magazine. Each electronic sound effect — such as a pulse wave, unfiltered white noise, and ring modulation of two sine waves — is introduced by a narrator with a somnambulant British accent.  There are lots of echoing, alien-like sounds to hear and learn about. At the end of the recording, we hear what it's like when the sounds are combined, which sounds like carnival music from outer space.