In this vintage BBC video, electronic music pioneer Wendy Carlos demonstrates the Moog modular synthesizer used in the creation of Switched On Bach.

Switched On Bach, originally released in 1968, did as much as any album to bring electronic music to a mainstream audience. The album topped the Billboard Classical Albums chart from 1969 to 1972 and went on to sell over a million copies. 

In the video, Carlos explains the basics of modular synthesis on the Moog modular synth and demonstrates how Switched On Bach was recorded.

This clip is from BBC’s Music Now, originally broadcast 8 February, 1970.