Interstellar Overdrive (9:42)

This song was first featured on the San Francisco Soundtrack and also in different form on the ‘Tonite Lets All Make Love in London’ movie.
“I was once trying to tell him about this Arthur Lee song I couldn’t remember the title of, so I just hummed the main riff. Syd picked up his guitar and followed what I was humming chord-wise. The chord pattern he worked out he went on to use as the main riff for ‘Interstellar Overdrive’. — Peter Jenner “…Barrett’s riff allegedly based on Love’s version of Burt Bacharach’s ‘My Little Red Book’”

— Mark Paytress, Record Producer Magazine

And of course it was quite different because my humming was so bad! The chord pattern he worked out he went on to use as his main riff for Interstellar Overdrive.” The song Jenner was attempting to hum was Love’s version of the Burt Bacharach and Hal Davies song My Little Red Book. Others, notably Roger Waters, also detected a hint of Ron Grainer’s theme to Steptoe And Son in Syd’s new riff.

— Jones, “Wish You Were Here”.

“I was trying to tell him about this Arthur Lee song I couldn’t remember the title of, so I just hummed the main riff. Syd picked up his guitar, followed what I was humming, and went on to use the chord pattern he worked out for ‘Interstellar Overdrive’.” ‘Interstellar Overdrive’, with its extended free-form passage, was the piece which established Pink Floyd’s experimental reputation and it was one of the tracks the group attempted during their first recording session at Chelsea’s Sound Techniques.