Sunday Music: I'm Not In Love

Groundbreaking wall-of-voices sound made by looping several feet of tape with band members singing one note per track, which were then faded alternately to create the chords of the song. It sounded so ethereal and innovative for the time that it propelled this single to the Top Ten worldwide, #1 in the UK, and #2 in the US, and put 10cc on the musical map, getting them a major recording contract on the strength of this one song. Debuting in 1975, it's lasted long enough to be heard most recently on the soundtrack of Guardians Of The Galaxy, forty years later.