Meddle

'Echoes' is a 23-minute progressive rock epic that occupies the entire second side of the original vinyl LP, featuring David Gilmour and Richard Wright singing wordless vocal harmonies over a slowly evolving groove. The track is widely regarded as a direct precursor to the compositional approach Pink Floyd would perfect on The Dark Side of the Moon in 1973.

Side one includes 'One of These Days,' a driving instrumental featuring double-tracked bass guitar by Roger Waters and David Gilmour; 'A Pillow of Winds'; 'Fearless,' which incorporates Liverpool FC fans singing 'You'll Never Walk Alone'; 'San Tropez'; and 'Seamus,' a blues track featuring a howling dog.

Pink Floyd recorded Meddle at various London studios including Abbey Road and AIR Studios during the first half of 1971, with extensive studio experimentation. The album was released on October 31, 1971 in the US and November 13, 1971 in the UK.

Meddle is widely considered the album where Pink Floyd transitioned from their early Syd Barrett-era psychedelic sound into the mature, atmospheric progressive rock style that defined their greatest commercial successes. Many critics and fans view the sprawling, atmospheric 'Echoes' as the essential bridge between the band's experimental 1960s work and the landmark albums Dark Side of the Moon, Wish You Were Here, and Animals.