usage: wav2wav [-d] {[-f]|[-5]|[-if]|[-of]} <infile> <outfile>
         -d debug mode
         -f fast (1200 baud) input and output
         -5 500 baud (Sharp pocket computers) in/out
         -if fast input file only
         -of fast output file only
         Fast mode works for FX-850P and PB-1000 only!
