Yet more code within the iOS 27 developer beta about Apple's plans for the home have included details of how HomePod mini surround sound will work with the rest of the ecosystem.

In retrospect the only unusual thing is that it took Apple years to figure out a way to make people buy four HomePod mini devices at a time. Then back in September 2026, it was revealed that Apple was working on how to join them together to make one home surround sound system.

Now prolific code sleuth pdfu has discovered further confirmation of the idea with details about Siri AI and home theater setups. Specifically, they've found that:

  • Siri can identify that a speaker belongs to a surround system
  • HomePods in a Home Theater group can pass Siri requests to Apple TV 4K
  • New HomePod light animation will play while using Siri AI

Those first two are about confirming whether the HomePod reacting to a request is part of a surround system. The code includes text saying "Accessory [X] is a speaker in surround system [Y]," for instance.

If the HomePod mini is in a system, then if there is also an Apple TV 4K in the setup, that speaker can relay requests to it.

The code at least implies that new Apple TV 4K will be needed. That's because what's described as a "separate, older path" retains the ability to send microphone audio to the Apple TV 4K device.

New HomePod light animation

It's the point about a new animation that is perhaps the clearest confirmation that Siri AI is indeed coming to HomePods. Leaker pdfu says it isn't clear when the new animation activates, but it's related to touch.

The animation is believed to be displayed when a user touches the HomePod, but Siri AI is currently processing a request.

So it's a touch rejection indicator. While pdfu has shown a demo of this, they say that the animations "are calculated by code in real time... [they] no longer use pre-computed frames."

Code leaker pdfu has a strong track record. They have previously revealed that the then-forthcoming iPhone Duo would use Touch ID, for instance.