Wow, what a riddle!

You have to remove the first 16 bytes (some kind of header) of the files so that they start with the FSB5 signature. Now they are FSB files (whatever that is), extract them into WAV with
FMOD FSB files extractor. I have no idea how you can convert them back to FSB/WAVC.
__________________
Joe Forster/STA
For more information, see the
FileForums forum rules and the
PC Games forum FAQ!
Don't contact me via E-mail or PM to ask for help with anything other than patches (or software in general) done by me, otherwise your request may be deleted without any reply!
Homepage:
http://sta.c64.org, E-mail:
[email protected]; for attachments, send compressed (ZIP or RAR) files only, otherwise your E-mail will bounce back!