Because of the quietness of Barrett 's singing , he was placed in a vocal isolation booth to sing his parts .
Bown 's microphone choices were mostly different from those used by Smith to record the Beatles ' EMI sessions .
Because of the quietness of Barrett 's singing , Bown was placed in a vocal isolation booth to sing Bown 's parts .
Bown 's microphone choices were mostly different from those used by Smith to record the Beatles ' EMI sessions .