Is there any good noise reduction programs that don't need x-windows in linux? Windows stuff is just too expensive. I mean, something that I could select a sample of noise, and filter a file based upon it. Of course sox can do so much, but I'm not that good to know what the parameters should be set to, even say to compress with it. It sounds promising for it's real time ability, say sox compress </dev/audio >/dev/audio so I can hook something to line-in to be compressed out in real time.