I was listening to the PARTY sessions, & noticed during 1 of the attempts at DEUCE COUPE someone (Brian?) yells "good modulations!" But this was a year before the first Good Vibes session...! Was the phrase "good vibrations" or variations on it (like "modulations") part of Brian's vocabulary long before the song existed?
"Modulations" - hmm, going from here to there, a good key change. Not that profound.