>So, we can make VCA, VCF, and RING MODULATOR with OTAs. Excellent answer, Taku. I believe that we can also make VCOs with these chips. -- john -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.7/816 - Release Date: 5/23/2007 3:59 PM