Hello Simon -
I'm not sure what section of the forums you posted this in, but it's best if you move it and for future reference to make future posts in the TelePresence area for subjects such as this.
To answer your question, take a look at the SX80 API Guide, pg 33.
xConfiguration Cameras SpeakerTrack Mode
Auto: Speaker tracking is switched on. The cameras in the camera assembly behave as one integrated unit that finds the active speaker and dynamically chooses the best camera view.
Off: The cameras operate as two individual cameras. Speaker tracking is not used.
