Led Zeppelin - Whole Lotta Love (Official Music Video)

Jimmy Page came up with the guitar riff for "Whole Lotta Love" in the summer of 1968, on his houseboat on the River Thames at Pangbourne, England. John Paul Jones has stated that Page's famous riff probably emerged from a stage improvisation during the band's playing of "Dazed and Confused". Page denied that the song originated onstage and that he had the riff and the rest took it from there.

The song is in compound AABA form. Playing the loose blues riff for the intro, on a Sunburst 1958 Les Paul Standard guitar, which ascends into the first chorus. Then, 

beginning at 1:24 (and lasting until 3:02) the song dissolves to a free jazz-like break involving a theremin solo and a drum solo and the orgasmic moans of Robert Plant. Audio engineer Eddie Kramer explained that he and Page experimented with mixing the album and left in some audio tape bleed through from an earlier vocal take. Page also employed the backwards echo production technique.