 Although Lennon and Spector disagreed over the bass sound , Lennon was " ecstatic " about the producer 's work on " Instant Karma " , author Peter Doggett writes . White 's drums assumed the role of a lead instrument , positioned prominently in the mix , of which Spector biographer Richard Williams would write in 1972 : " No Beatles record had ever possessed such a unique sound ; Spector had used echo to make the drums reverberate like someone slapping a wet fish on a marble slab , and the voices sounded hollow and decayed . " Spector wanted to add a string section to the track in Los Angeles , but Lennon insisted that the recording was complete . 
