Hi, I've been playing with Sox for a while but I can't seem to find how to do a specific thing. Could somebody please tell me if what I want is possible and if so, how to do it. One of the things I want to do is to boost a range of frequencies. Basically from 20 Hertz to 320 Hertz, where 80 Hertz is considered the 'center' and the boost gets less when going to 20/320 Hertz. I have found the highp(ass)/lowp(ass) options but these don't seem to be of use for this. I'd really appreciate some help here. I need this to be done by a command-line tool available under Linux and if possible under Windows (even if I would have to compile it myself).. Grtzzzzzzz Roel...