Quote #110
'Sam Phillips used what we call 'slapback' or 'tape delay', which lent an otherworldly patina to Presley's voice. And I don't know if Sam was really conscious of it at the time, but if you listen to old pop and country records back then, the voice was always so much farther out from the music; Sam kept Elvis' voice close to the music, so, in essence, Elvis' voice became another instrument'