Hi Steve, I’m not sure what command line you are talking about.
My setup is:
Here is the command, I run those manually to monitor them.
Usrpaudio.py throws a couple of error at launch but it works
Actually I run this on a debian virtual machine on my laptop, at the end I plan to run this on aws where there is no sound card so I think I’ll have a another funny troubleshooting weed-end :)