I'm editing a song cover from someone I'm following on You Tube so I can listen to it on my iPod as an mp3, and I'm having problems with the sound dipping every one in a while. It's like when someone starts talking and their voice starts getting REALLY quiet. I'm using Wave Pad to edit the file, but after I put a filter on it to take out the hum and hiss of the background noise (she was just using her webcam), the sound starts to dip every once in a while. Is there a filter in the program I can use to take care of that? Please help! My audio editing skills are good, but they're not THAT good!