 This involved a difficult process of recording where Rainey sang to pre-recorded tracks playing back at half-speed, on which she would sing rock songs in the same, high keys, holding the same, difficult high notes, holding them twice as long as in a normal rock tune, after which the whole thing would then played back at the original speed, with the result that the instruments sounded normal and her voice had the requisite, "chipmunk" sound.She has since said that it was the most difficult singing job she ever had.She was known at that time around Hanna-Barbera as "the funkiest chipmunk ever!"