I’m running 10.7.1 (yes, I know it’s old, but this may be a problem in later versions too) and had a conference being recorded via:
The bridge started out at 8KHz despite one HD device. But when the second came in (G.722), it switched to 16KHz. At that point, the recording file had the bitrate change in the middle. That seems wrong. I’d expect the bitrate of the recording channel to remain unchanged and transcoding to be used to do the recording. But it wasn’t.
Does this “ring a bell” with anybody?