In a third implementation of the apparatus according to the first aspect, the decision unit is configured to decide to generate the drive signals for a selected audio zone of the one or more audio zones using the sound field synthesizer if an angular direction from the selected audio zone to a virtual source of one of the one or more sound fields deviates by more than a predefined angle from one or more angular directions from the selected audio zone to one or more remaining audio zones of the one or more audio zones.