Atom Heart Mother is the fifth studio album by English progressive rock band Pink Floyd, released in 1970 by Harvest and EMI Records in the UK and Harvest and Capitol in the US. It was recorded at Abbey Road Studios, London, England, and reached #1 in the UK, and #55 in the US chart, and went gold in the US in March 1994. A remastered CD was released in 1994 in the UK, and 1995 in the US.
This was the first Pink Floyd album to be specially mixed for 4-channel quadraphonic sound as well as conventional 2-channel stereo. The SQ quadraphonic mix was released on LP in a matrix format compatible with standard stereo record players. There was also a release of the quadraphonic version in the UK in fully discrete 4-channel form on the "Quad-8" format, a 4-channel variant of the stereo 8-track tape cartridge.
The original album cover, designed by art collective Hipgnosis, shows a cow standing in a pasture with no text nor any other clue as to what might be on the record. Some later editions have the title and artist name added to the cover. This concept was the group's reaction to the psychedelic space rock imagery associated with Pink Floyd at the time of the album's release; the band