Hi,  Babyface ProFS all is working fine except:
I had it setup in Totalmix so the OUT button toggled between main outputs (speakers) & (head)phones.
It used to be that when I toggled main outs would automatically mute when on phones. This suits me.

Now I've lost  that capability & not sure why, tho I have just moved from 09 MacPro to m1macbook air/monterey
Have done flash update for monterey.

in the ARC setup window I've set the OUT to toggle main/phones but....it toggles thru the outputs but nothing changes.
Audio is still present at main & phones, I just want the muting back when on cans......

?