The Accidental Fire That Destroyed the Original 'Atom Heart Mother' Master Tape – and How the 2010 Reissue Brought It Back

In 1970, Pink Floyd’s Atom Heart Mother was the band’s first album to hit No. 1 in the UK. But the original master tape? Gone. Sometime in the early ’70s, a fire at EMI’s tape storage facility in Hayes, Middlesex, destroyed the two-track stereo master – the one mix the band had approved. Nobody noticed until decades later, when the 2010 Why Pink Floyd…? reissue campaign began.

Engineers discovered the stereo master was a ghost. So they turned to the surviving four-track multitrack tapes, which had been stored separately and survived. The original album was mixed live to two-track with orchestra and choir all in one take. For the reissue, Andy Jackson and James Guthrie had to reconstruct the mix from the four-track sources, using the original session paperwork and memories to approximate the vanished stereo master. The result isn’t an exact replica – it’s a slightly different, yet faithful, version that became the definitive listen for modern ears.