Hi there. I have an interview with a lot of AC hum. I'd like to remove as much of the hum as possible. This is not for broadcasting. I just want to be able to hear what the persons on the recording are saying. I've looked at the sound in a frequency spectrum analyzer[1]. The hum looks just as consistent as it sounds so I guess there must be a way to filter it out. I just don't know which linux tool will do it for me. alex [1] http://www.baudline.com -- Alex Polite http://flosspick.org - finding the right open source