Apple Is Testing a Four-HomePod Surround System, Code Suggests
References in the software for the second-generation HomePod suggest the ability to tune for a setup with front-left, front-right, rear-left, and rear-right HomePods. The four-speaker surround configuration references automatic room calibration, speaker-position mapping, timing adjustments, bass management, EQ, dialogue enhancement, and different processing modes for movies and music.
