Hello Marcus
Have you tried using the native ‘arecord’ command ?
This may help isolate whether it’s in GR’s audio source or what…
Also look within ‘alsamixer’ for any odd little switches etc
Also, there’s a possibility that 192K might only be supported with
restrictions (mono only or s-INT16 only or something)…
Additionally, try the 96K rate to see if at least it will go that high.
I’ve also seen other weird things with sound cards such as a 90 degree
phase delay between the two channels - with the same exact signal
connected to both L and R inputs.
Do I have to do anything special to pulseaudio configuration
to get support for the 192KHz rate?
Not experienced with pulseaudio, but it appears to be a userspace tool -
as is GR - suggest that you initially bypass/disable it entirely to
prove/disprove whether 192k works natively (or not) first…
Best Regards
Max