Just in case anyone runs across this (not sure on the rule about necro'ing threads), but this is the ACM Codec that ASFTools uses to encode it's WAV files.
I found the answer: here
Seems that software is using quite an old codec. Hopefully it does not affect anything too adversely on my system. :D
I found the answer: here
Seems that software is using quite an old codec. Hopefully it does not affect anything too adversely on my system. :D