Audio soundtrack on MiniDV tape corrupted by EMF noise, how do I wipe the noise off to get the underlying soundtrack?

I recorded a concert of sorts yesterday using external mics plugged into a mixer
which had a mic level output and that plugged into the mic input on the
camcorder. I have done this before without any problem like this. The concert
was in a hotel ballroom with flourescent lights everywhere about 20 feet up.
There was no headphone jack, so I couldn't monitor during recording; but my VU
meters on the mics and in the LED VU display on the camcorder seemed to be OK
during recording. So today I play back the tapes and there is this annoying
noise at the highest possible audio level across the entire audio spectrum. I
used a graphic EQ in the stereo system to cut out as much annoying noise as I
could (8K, 16K, 31, 60 and 125 hz too) so we could check on the concert music.
What's left is still riddled with this noise that is constant (not breathing or
pumping as would be the case with Automatic Gain Control turned on if it existed
in the camcorder). My only thought is the flourescent lights overloaded the
audio track within the camcorder itself during recording, the video looks fine.

So my question is how do I get this onto the computer (via firewire) so that I
can sample this EMF noise and wipe it from the audio track, and leave the audio
concert material intact.



.

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