From some of the reading iv'e done thus far I've learned a few interesting things in regard's to low pass filters high pass etc, for example dsl filters are an example of low pass and high pass filters to seperate the dsl and pot signals on the same line, interesting stuff, Im vaguely familiar with the term as I dabble in synth music a little but I am not editing sine waves by hand by any means lol. Thanks for all of you help guru I'll read into it and most likely work on a few projects with filtering and attenuating frequencies and Move on from there.