Hey all. I have just joined here, and need help with a low pass filter program I want to do. I have seen the Butterworth filter on the net, but I have no clue on how to n apply this to a pre-rendered audio stream...any ideas ? Thanks, By the way, I have individual sample access to the stream. GBNvK

I've built analog low pass filters before but never attempted anything in code. Might want to have a look at this, it appears to have some sample code related to the butterworth filter and a few other things. It may or may not be of use to you, because honestly I'm not even sure what it is [smile]

Sorry I couldn't have been of more help.

Maybe this will help?