I'm working on a project that uses an ISD2560 sound recorder with an SX as the controller. The circuit is working but there is background noise generated by oscillations that occur when I read 2 pots that control the frequency of the playback. If I add delays between the code that reads the pot I get a lower pitch but I can't get it to go away completely without making the response time to slow. I tried putting filter caps of different sizes but no success. Any suggestions would be great, I'm a software guy and this hardware stuff kills me sometimes. Thanks Bill ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com