Four-HomePod surround is almost here, and Apple is adding more capabilities to its Home software. Highlights from audioOS 27.2 beta 3: • Siri can match a speaker to its surround system. Code includes the diagnostic “Accessory [X] is a speaker in surround system [Y].” Relies on HomeKit exposing the surroundSystem interface.​ • When HomePod is part of a Home Theater group for an eligible Apple TV, it can now use a new proxy-activation path to pass Siri requests to Apple TV. A separate, older path still forwards microphone audio to Apple TV. (AFSiriActivationOdeonProxyVoiceTrigger)​ • There’s a new light animation for rejecting touch events on HomePod. As an example, here’s a demo of HomePod rejecting touch events while Siri AI is in thinking mode. It’s not clear yet when the new touch rejection may activate. (ShakeCircleAnimation)