OK, here is the solution. I solved it myself. You install "pavucontrol" in the internal VM.
Then ,if you look at it, you will see that the USB mic is actually detected automatically. So in fact, no need to detach anything, or disable any USB qube. You just simply install "pavucontrol" inside the App VM. The USB mic doesn't show up in dom0's pavucontrol But it does show up in pavucontrol of the internal VM Solved. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/dab90fec-8bbb-4738-a6c4-ed009977d21a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.