Hello Alan and welcome to the Cow Audio Forum
"soft high thin" Hmm, I'm guessing it's real "roomy." You could post ca lip somewhere and let us know where it is so we can hear it, but my guess is you're pretty hosed. There really is no filter or processsor that can take away room sound from a camera mic.
You can try to roll of the top a bit 'cause a lot of room sound has reflections. Try notching the 1kHz to 3 kHz up a bit. A lot of voice energy is in that area.
Sorry for your pain.
Regards,
Ty Ford
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