Private Zones

The Private Zone setting prevents remote control of connected audio outputs. A private zone can only be controlled from the device that it's connected to. This is most useful for personal devices like phones and tablets, that shouldn't be available as playback devices to other members of your household. You can make an audio output private by enabling the Private Zone setting on that device's settings page:

For more information about audio settings in general, see Audio Setup Basics. For more information on Zones in Roon, see Zones.