But it was also thanks to 20-year-old engineer Geoff Emerick, who was promoted to replace veteran Norman Smith. Emerick is most notable for his work on the first track recording for Revolver, Lennon’s ‘Tomorrow Never Knows.’ By recording his voice through a Leslie speaker, it gave it the faraway sound the song is known for, which was something that had never been done before. It was ideas like this, along with the microphone placement for McCartney’s bass and Starr’s drums, that paved the way for the way studio recordings were done after Revolver.
An interesting look at what makes “Revolver” the most important album in the history of the Beatles. I always thought it'd be Sgt. Peppers.