receiving a video stream representative of at least one person and at least one microphone;

deriving person-microphone position signals using the video stream;

using at least some of the person-microphone position signals, generating audio gain adjust signals for input thereof to the audio system;

recording at least one calibration person-microohone position signal;

recording at least one calibration audio level contemporaneously with the calibratiotperson-microphone position signal;

using the calibration signal and calibration level, generating at least one mapping correlating head orientations to respective gain adjust percentages; and

at least in part using the gain adjust percentages, establishing an audio gain of the audio system.