Hi,
in latest night, my external audio card had disconnected from Resolume Arena 6.1.1.
It is a usb Audio Card, I select it in the system preferences for audio output.
I start Resolume Arena, I selected the usb audio card from the menu and it work.
After 1 hour the Audio Card doesn't work.
I check in the Arena preferences and there was not my usb audio card in the audio combo box menu.
I check in my macbook preferences and the audio card was select.
So I quit Resolume Arena, I start again Resolume Arena, now in the preferences of Arena there is the usb audio card and it was no longer disconnected.
It is not the first time.
The other time, I reboot the Mac because I didn't check where there was the problem.
Thanks