exclude certain files from fdupes output

[Curt Tresenriter]

I need to run fdupes on a large number of audio files, 3+ TB, in two
or three subdirectories and would like to exclude all files that are
jpeg, jpg, png, txt, pdf etc. - essentially any file that is not an
audio file.
Fdupes output needs to be a file I can open in a spread sheet for
comparison.

Is there a simple way to do this easily and/or quickly?