What happens when you lose power during recording? Well...

This little tool fixes the length information in the WAV file header. To use it, just run python fix_wav_length.py 1.wav 2.wav ...

The WAV format is flexible, meaning the header can include arbitrary other data as well. All the other "fixer" tools I found ignore this, thinking that all WAV headers are 44 bytes. A few even check before corrupting your file. This tool is a quick and dirty coding job and I'm not proud of it, but it can deal with at least a few different kinds of WAV headers and tries not to corrupt your file. Make a backup anyway, though.

Oh, and be careful with files over 2 or 4 GB. Up to almost 4 GB should probaly work, but the WAV format only gives you 4 bytes for a file size including headers. Go ahead and fork and patch this to work like http://offog.org/darcs/misccode/fix-wav-length if you need; it should be easy.