Hi, I don't know if it makes sense to mention this here instead of there (http://www.adventuregamestudio.co.uk/forums/index.php?issue=765.0), because it seems to me like this is more of a bug or lack of a feature, rather than anything I could be helped with, but I can't be sure.
If I remember well I was able to play 44Khz WAV before, although AudioChannel functions didn't work at all. But now for whatever reason it just won't play 44Khz WAVs.
Anyway i mostly wanted to mention this issue in case its not known.