AudioOS 27 code reveals a four‑speaker setup, new calibrations, and a "Party Mode" for HomePods. Discovered in beta 8 of the second‑generation HomePod, the references include front and rear left/right tuning files, suggesting rear HomePods will deliver omnidirectional audio while front units handle primary sound. These features could support system sounds, Siri, movies, and multi‑channel audio with dialogue processing, bass management, and dynamic range control.

Spatial audio adjusts based on playback, and Party Mode spreads sound more ambiently across stereo‑paired units. Though not slated for the OS 27 release, the code hints at upcoming hardware, possibly a new HomePod mini later in 2026.