While bg is working on a more optimal solution I made a batch file for the audio extraction/converting process.
It will extract every .xwb file into subdirectories and then convert every .xwm to .wav wich ends up with the folowing directory structure:
--Main (where batchfile and xwb files are)
--Original (containing xwm and wav files extracted from xwb)
--Converted_WAV (containing the wav files converted from the xwm files)
All you need to do to get is running is placing the unxwb.exe and xWMAEncode.exe with the batch file (miseAudioProcessing.cmd),
Then placing the xwb files you want to extract in the same directory and then run the batch file.
You can download the batch file here: http://hulauncher.jrpweb.nl/files/mi...Processing.cmd