Selecting a background source for a zone

We might expect that, once a Vocia system is configured and loaded into the different units, our program source will start playing through the loudspeakers. However, that is not the case, even if there is only a single program source. In Vocia, the default state for a zone is to have no program source selected, and to have the BGM volume set to minimum. This article explains how to select and play a source in a zone.