I'm working with two applications that email 3gp audio files to my Treo 650. One sends files that play, the other doesn't.

When I open the files in Quicktime they appear very similar. The only difference is the data rate: 12.8kbps for the good, 9.12kbps for the bad. I don't know if that's the key difference or not.

I really want to get the other application working.

Is there a specification page that lists the gory details as to what the Treo 650 will play (specifically Pics&Videos)?