Hi Sal,
Thanks for the Strawberry tip...
I know that software and I really never got to understand it's logic.
Or maybe it simply doesn't fit my wantings.
But I will try it again...
I tend to use gmusicbrowser.
I have configured it to use ALSA, but I think it does not as I can still control output volume with the system volume.
I may try to install JACK... Not sure how to do it, but I'll find out
I’m not up to speed on jack configuration but it used to be notoriously difficult to set up and prone to breakage on systems with rapid update cycles. If you have issues it may be best to use a more stable distro or a specialist audio one.