On Fri, 2010-12-31 at 16:24 +0100, Ralf Mardorf wrote: > Btw. there's a book from 1984 "Yamaha DX7 Digital > Synthesizer" by Asuhiko Fukuda Oops, Yasuhiko Fukuda Yamaha DX7 Digital Synthesizer (c) 1984 by Rittor Music Inc. OrderNo.AM 39371 ISBN 0.7119.0653.X