Geoffrey Ernest Emerick (5 December 1945 – 2 October 2018) was an English sound engineer and record producer who worked with the Beatles on their albums Revolver (1966), Sgt. Pepper's Lonely Hearts Club Band (1967) and Abbey Road (1969). Beatles producer George Martin credited him with bringing "a new kind of mind to the recordings, always suggesting sonic ideas, different kinds of reverb, what we could do with the voices".
Emerick also engineered the Zombies' Odessey and Oracle (1968), Paul McCartney and Wings' Band on the Run (1973) and Elvis Costello's Imperial Bedroom (1982), among many others. He won four Grammy Awards for his work in the music recording field. His 2006 memoir Here, There and Everywhere: My Life Recording the Music of the Beatles caused controversy for its factual errors. In 2018, Emerick died from a heart attack at the age of 72 in Los Angeles, California.