Page "Hey Jude" Paragraph 13
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Sound engineers Ken Scott and Geoff Emerick claim the exclamation came from McCartney, and that it was Lennon's idea to leave the mistake in the final mix.
"' Paul hit a clunker on the piano and said a naughty word ,' Lennon gleefully crowed, ' but I insisted we leave it in, buried just low enough so that it can barely be heard.
'" However, in the book Recording The Beatles, engineer Malcolm Toft recalls, " Barry Sheffield engineered ' Hey Jude ', but I mixed it ... John Lennon says a very rude word about halfway through the song.
' This was because when he was doing a vocal backing, Barry sent him the foldback level volume too loud and he threw the cans on the ground and uttered the expletive.
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