Well, I tried it with only 5 digits, and it does the same thing... :-) Really I don't need that much precision, and probably some of it gets stripped out by the native data types anyway... mostly this is just personal preference; I think it's better to have a few too many decimal places than a few too few...

Note that you'll need POE, PDL, and Audio::SoundFile (which relies on libsndfile, which is linked from the perldoc page for the module). These all can be gotten from CPAN.