<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Hi, I think this is my first post but I've been lurking for months now.<BR>
I'm looking to build an electronic drumset using a noise source split into several identical channels, filtered, and mixed back together. The trouble is, the book I'm getting the basics out of (Build your Own Low-Cost Signal Generator, by Delton T. Horn) lists two ICs for noise generation, the MM5837N and the S2688, but a Googling shows that neither are easily available. Can anyone here point me towards another suitable IC?<BR>
As background, I'm building a simple drum machine as a first sdiy project (not very synth, i guess, but a good start). I haven't purchased many components yet because I want to make sure they're all available - so far, that's the only one that's not.<BR>
Also, are there any reasonable alternatives to optoisolators for voltage-controlled resistors? How is voltage control usually handled in synths? (this one's been bugging me for a looong time...)<BR>
-eric</FONT></HTML>