If you have quiet sections where all you can hear is the hum (even for 2 seconds)you can isolate it and remove it with certain programs. I use "cool edit pro" to do this, and have seen it work, but you have to be able to isolate the unwanted noise. That requires at least 2 seconds of audio where all you can hear is the hum. Mor time is prefferable.

Matthew Sconce

oh, sorry, here are the details. Open the sound file in Cool Edit Pro. Zoom in on the Sound section that has only the hum. Highlight it and go to the Transform menu. Go down to noise reduction and when the pop out options come up, choose "Noise Reduction". Click "get profile from selection". There, that troublesome hiss or hum is isolated! Now highlight the entire track and go back to the menu you were just on, where you isolated the sound. Click "Ok" and the noise reduction will occur. This is exactly how I would get rid of the hum. I hope this helps a little.
-Matt Sconce

Matthew Sconce

Also, I've heard that with Pro Tools you can eliminate part of the sound waves you recorded, in which case you'd be able to locate where on the sound waves they are and cut them out. I don't know how it will come out though and I've never used pro tools.

awesome, thanks for your help.

the rightful heir to the throne of France

hi
If you have a section that has no vocals on it/just hum you can use it as a template to subtract those frequencies from the rest of your sound. Sony Sound forge is good and has a plug in to do this more easily. You could also try a spectrum equaliser to take out the offending frequencies but this can be tricky as you need to be careful not to subtract frequencies that also occur in the vocals... You risk the over-all sound becoming nasaly or unclear.. depends what frequencies your hum is at.. Best thing to do is to check when you are recording.. turn of air con, fans etc and make sure your mic doesnt pick up the camera's operational noise
Janene x