[Publius6961]

Interesting and useful recommendations here!
I have a special problem that hasn't been mentioned. I have some audio recorded on a camcorder (classical piano music), where the autogain in the camcorder allowed the hum of the camcorder motor to be recorder along with the music.
Is it possible to "filter out" a constant frequency hum such as that?

Thanks to all for the cool information!

[Biblical Calvinist]

I'm very sorry to be so late in responding to your question. Yes; there is a way to get rid of the "hum" in the background. Cool Edit has the ability to "wipe out" any HISS or background hum - but this software is really expensive- Audacity does pretty much the same thing; but it's FREE; at least, the last time I looked- it was free. You can find it listed in the TOOLS section at www.videohelp.com

I think there's a "How To Use Audacity"
giude there as well.

That "hum" is called a "GROUND LOOP HUM"; this drives me crazy whenever that hum happens; but Cool Edit takes care of the hum fairly well.