<P> Led Zeppelin recorded "When the Levee Breaks" for their untitled fourth album . When considering material for the group to record, singer Robert Plant suggested the Kansas Joe McCoy and Memphis Minnie song . Jimmy Page commented that while Plant's lyrics identified with the original, he developed a new guitar riff that set it apart . However, it is John Bonham's drumming that is usually noted as the defining characteristic of the song . </P> <P> Before the released version, Led Zeppelin attempted the song twice . They recorded an early version of the song in December 1970 at Headley Grange, using the Rolling Stones Mobile Studio . It was later released as "If It Keeps On Raining" on the 2015 reissue of Coda . Prior to relocating to Headley Grange, they tried unsuccessfully to record it at Island Studios at the beginning of the recording sessions for their fourth album . </P> <P> Page and John Paul Jones based their guitar and bass lines on the original song . However, they do not follow its twelve - bar blues I--IV--V--I structure, but instead use a one - chord or modal approach to give it a droning sound . Plant uses many of the lyrics, but takes a different melodic approach . He also adds a harmonica part; when mixing, a backward echo effect was created, whereby the echo is heard ahead of the source . </P> <P> Parts of "When the Levee Breaks" were recorded at a different tempo, then slowed down, explaining the "sludgy" sound, particularly on the harmonica and guitar solos . It is the only song on the album that was mixed at Sunset Sound in Hollywood, California (the rest being remixed in London). Page identifies the panning on the song's ending as one of his favourite mixes "when everything starts moving around except for the voice, which remains stationary ." The song was difficult to recreate live; the band only played it a few times in the early stages of their 1975 U.S. Tour . </P>

Who plays the harmonica on when the levee breaks
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