When I type in "flac -8 *.wav" on Windows, I get an error.
Of course, I can run flac manually for each file, but that's a pain in the rear end.
On Mac, "flac -8 *.wav" works as expected.
the "*" is expanded by your shell. Not by flac. What shell are you using on Windows?
If you use 'bash', say, running under cygwin -- it will expand the *'s properly and pass them
to the program.