[rmoat]

I figured I can get past this issue by doing the following:

1. Change HW buffer to different setting (1024, if I'm using 512, or vice-versa).
2. Let Pro Tools sit there frozen for several minutes 2 - 5 minutes
3. Finally unfreezes, and then I can switch it back to the HW buffer I had it at and it plays

I noticed that when this happens though, when I save the PTX file again, it is very huge. It jumps from 2 - 4 MB to 40 MB. Not really sure what it's saving in that file during these issues.