Removing audio distortion?

[Sean W.Gallagher]

I'm editing a speech that was shot with two cameras and the audio from 
the speech came directly from the speaker's microphone into camera one, 
but it's slightly distorted. I tried using the audio from camera two 
(which is perfect), but the cameraman cut the camera at a crucial point 
in the speech. Is there a way to remove the distortion from the audio? 
I have Peak DV, but I don't know how to use it. I'm editing in FCP3, 
but I can't figure out what filter would do this if any. Any help would 
be appreciated.

-Sean