WAV audio distortions when editing

[solstrike]

Hi, I'm pretty new to video editing, but I've always known of videohelp.com's forums, and I regularly visit for information. Now I have a serious problem for a project with an imminent deadline...

I filmed a video over two days using a JVC DV camcorder (forgot the model, it's not mine), but the problem likely started on the second day when I fiddled around with the camcorder's settings.
I recall changing the audio setting from 12 bit to 16 bit, and the frequency from 32,000Hz to I think 48,000Hz.
However, when the movie was uploaded to a friend's computer, the clips were not split, but joined, so the two days with the different settings produced a large 3.6 GB file. It PLAYS fine in Windows Media Player of all things as well as Media Player Classic, but whenever it is opened up in an editing program, for instance, Adobe Premiere CS3, the second part (after the setting changes) of the film would have this immensely distorted audio track.
It is extremely low (bass-wise), and it essentially sounds like it's slowed down, which isn't the case because the video length doesn't change, and the video does not appear slowed. I've tried increasing the speed of the distorted portion, but that results in clipped audio. I've tried extracting/converting the WAV using virtualdub 1.8.3, but the second part of the audio is just noise.

I've tried starting new projects in Premiere with different bitrate settings, but only the first day half of the clip has useable audio. everything from after changes in setting is still immensely distorted.

If anyone knows ANYTHING about this problem and how to correct it, please help! I'm about to shoot someone...

[Soopafresh]

The two files must have different sampling rates, which usually should prevent them from being joined in the first place. Try AoA Audio Extractor

http://www.aoamedia.com/audioextractor.htm

If that doesn't work, you might have to resort to recording "what you hear" - play the audio in Media Player, then record in realtime with Audacity.

[solstrike]

Thanks for the help! AoA freezes on me, but I'll use Audacity if nothing else works.