[hpsdr] Monitored audio "stuttering" on some PowerSDR TX Audio Profiles

[Michael Carey]

Hi Everybody,

I've been doing some more tests with my HPSDR/PowerSDR setup today in 
the shack and have been coming across something weird while using the 
MON function.

My setup for testing is using a R0DE Podcaster USB microphone connected 
to my shack PC together with VAC1 configured to use this audio input for 
transmit.

I've tried a handful of transmit profies, some give me very bad 
stuttering in the monitored audio, and some sound fantastic. I've looked 
at the transmit profiles in setup and can't really see any different 
between them that correlate with my findings.  The CPU load barely moves 
a handful of % when I transmit, I don't think it is a CPU bottleneck 
problem.

Default - OK
Default DX - No good
SSB 3.0K CFC - OK
SSB 3.3K CFC - No good
AM - No good
AM 10k CFC - OK

When I select a transmit profile in PowerSDR is anything else changed in 
Setup apart from what I see on the Transmit tab?

73

Michael.
VK5ZEA