Apparently in the Ensoniq SQ80 for one. http://www.buchty.net/ensoniq/ http://www.buchty.net/ensoniq/files/techdoc.pdf.gz -Dave > I found one of these chips - apparently an integrated S&H + Demux. > > In which synthesizer(s) has this been used? > > Is it valuable? :) > > JH. > > >