Output Routing
For the Control Room to work properly, assign the Main Mix bus to the set of outputs that contains the mix that you want to hear.
If you only have one output bus, it automatically becomes the Main Mix. All other outputs are not routed through the Control Room.
The channel width of the Control Room can only be as wide as the Main Mix bus.
All other outputs are not routed through the Control Room.
However, they can be added as additional monitor sources in the Audio Connections window. When the Control Room is enabled, the Main Mix bus is automatically shown on the Control Room tab. The reason is that the Main Mix is always available as a monitor source in the Control Room.