> I tried setting File types "php, php3, asp..." to
> "application/x-mp3" and also tried "no robot rules"
> but all the audio files keep getting saved as PHP
> files, and they aren't all mp3 files there are a few
> odd wmv files too. 
> url.com/forum/mod_music/download.php?audio_id=13212

setting the mime types won't work because it won't scan the actual pages to
get the files
If site returned a audio mime when opening download.php?audio=x. HTT would
have handled it correctly.
I had a site that did the same thing. Just rename the downloadHHH.php to .mp3
and they'll play just fine.