I have a group called outdoors, that contains 4 outdoor cameras. I have another group of 4 indoor cameras.
When logging into the web UI and viewing live footage of the 4 outdoor cameras group, I can hear audio from one of my indoor cameras. When viewing the live footage of individual cameras, I do not hear the indoor camera footage.
Running MacOS 10.13.6 on Mac Mini (Late 2014) and SecuritySpy 4.2.8.