I developed a little program (KORG Media eXtractor) that would help me extract a sound as a .Wav from PCM & KMP files. I thought I'd share it with you, which helps speeding up stuff.
Quite simple to use. Simply click on the relevant button depending on which File format you wish to add PCM/KMP and select the folder which contains that File extension. All the Files will be then picked up and shown on the left. Simply clicking on each item would open the contents on the right hand list and by clicking on each you would be able to hear and view the Sound details.
You can extract a Single .Wav or CTRL+Click for multiple selections. Click the 'Export .WAV' button and that would save all the selected Files as .Wav in the same folder as the .exe & "Exported".

You can download it from here: http://www.wavextractor.com
I've tested it a lot. In case you do get errors (hopefully you dont

Thanks