On Tue, 2019-02-05 at 13:57 +0100, Ingo wrote:
does qjackctl show both devices? if so, you could try to use that for the connection management.
Unfortunately I don't have qjackctl installed ... :-(
Fortunately, it's free software and can be installed with 'apt installed qjackctl' on a Debian-like system ... :-)
Roman