I am having problems with MeetMe conferencing, where the audio is continuously stuttering. The prompts and recorded names are perfect, but the audio of others talking in the conference sounds like every other 20ms frame is being replaced by silence. (This is hard to describe, and the problem may not have anything to do with frames missing.)
I am using ztdummy on a Debian Linux server with kernel 2.6.8. I have tried compiling ztdummy in USE_RTC mode, but the problem is the same.
zttest reports something 99.95% accuracy, which I know is a bit on the low side, but I believe getting this wrong affects the delay between speaking and being heard rather than audio quality itself.
Best: 99.963379 – Worst: 99.938965 – Average: 99.952958
I have also tried this with a Digium card, and conferencing did work properly. Unfortunately that card stopped all the other PCI cards working so I have resorted to using analog->IP adaptors on the phone lines.
I am not aware of any other problems with the installation.
What should I be looking at next?