Thanks for this Dave
AS expected replacing your Device with my II worked at treat.
Signal to noise level output not great and is worse in the headset than it is on the sbitx speaker, however its not great there on mine anyway. Turning the volume up on the sbitx just seems to make it worse. The usable volume range is such that there is almost no audio until the volume control reaches a setting of 50+, a reasonably comfortable audio setting of about 86 is required to listen to the sbitx speaker.?
Word of warning for anyone following this thread and using the 64-bit OS. if you boot the sbitx up with the USB headset plugged in, the sbitx app will not start,, unplug the headset and reboot again if this happens.
On the stock v3 sbitx I had a slightly different experience in that if I booted the radio up with USB headset connected, the headset would work in parallel with the sbitx speaker. Adjusting the volume on the rig makes no diference to the audio out of the USB headset currently. The headset has its own volume control in my case, this also changes the volume on the sbitx speaker as well in my case.
this command produces better output in my headset than I get from the sbitx speaker:
arecord -D "plughw:CARD=Loopback,DEV=1" -f cd | aplay -D "plughw:CARD=II,DEV=0"
Just need to increase the volume to it now, perhaps using the rig volume control to allow the headset volume control the local control for fine adjustment
A step in the right direction me thinks
Still testing
Regards
Paul G0KAO
