Electronic music composer Wendy Carlos - whose debut album Switched-On Bach has introduced a new audience to classical music - explains the fundamentals of electronic sound using her Moog Synthesiser, and demonstrates some of the techniques she employed to adapt Johann Sebastian Bach's compositions for the electronic age. This clip is from Music Now, originally broadcast 8 February, 1970. You have now entered the BBC Archive, a time machine that will transport you back to the golden age of tv to educate, entertain and enlighten you with classic tv clips from the BBC vaults. Make sure you subscribe so that you never miss a single stop on our amazing journey through the BBC Archive - null