no firsthand experience, but Blacet sells a chip: http://www.blacet.com/misc.html; there's a schemo at http://www.blacet.com/MSfig3.gif. bbob >----- ------- Original Message ------- ----- >From: altitude at optrand.com >To: synth-diy at dropmix.xs4all.nl >Sent: Tue, 5 Dec 2006 10:28:16 > > > >Can anyone recommend some sites/schems/etc? > >TIA, >Raph