In my own opinion, I think Martin should take time to look at the audio in vMix and recode it.

Then all other videos with audio should be limited to 50% and all Audio in/out be set via the Master Audio Input.

e.g. if No Audio input is selected for the master Audio, vMix should display a message that Audio need to be set. vMix should now look into that master audio to distribute as when needed...

Thanks.

Rottimmy
www.fusionplustv.com