Previously Unreleased Electronic Music From Original Mothers Of Invention Keyboardist. One could hardly not see in Don Preston a key musician within Frank Zappa's oeuvre. He is not only that, but his presence has marked The Mothers' major records from 1966 to 1974. His touch was already there before the arrival of Ian Underwood, and it continued after Ian left. You all remember King Kong (its magnificence as interpreted by Dom DeWild) from the second Uncle Meat suite. A certain form of jubilation emanates from this track, thanks to Preston's fluid style and lightly astringent tone on the Moog synthesizer - that instrument never sounded quite like that before or after.