"There was a Motown sound, there was a Nashville sound, there was a Memphis sound, and I said, 'Muscle Shoals Sound, '" Hood tells NPR's Debbie Elliott.

NPR: The Legendary Muscle Shoals Sound

He later was a songwriter for crosstown rival Muscle Shoals Sound Studios before returning to Memphis.

NPR: Rock And Soul Songwriter George Jackson Dies At 68

The elders in Memphis would say, 'You have to have a beautiful sound or all those notes don't mean anything.

WSJ: He's Kept Growing | Charles Lloyd | Cultural Conversation by Stuart Isacoff