The Beatles all considered Elvis Presley to be one of their rock idols. Much of their love for the genre comes from listening to early records by the king of rock. Paul McCartney said The Beatles tried to utilize some of Elvis’ techniques in their own work, and one song perfected what he called the “Elvis echo.”
One Elvis Presley song that profoundly impacted Paul McCartney was “Heartbreak Hotel”. McCartney was in awe of the Memphis singer’s vocals, but he also was fascinated by the blaring echo that gave the track a distinct sound. The Beatles wanted to replicate that echo, and McCartney said one song that perfected it was “A Day in the Life” from Sgt. Pepper’s Lonely Hearts Club Band.
“Elvis is a truly great vocalist, and you can hear why on Heartbreak Hotel,” McCartney said in 2005 (via Guitar World). “It’s a perfect example of a singer being in command of the song. Musically it’s perfect, too. The double bass and the walk-in piano create this incredibly haunting atmosphere.
Source: Ross Tanenbaum/cheatsheet.com