Code discovered in audioOS 27, the HomePod operating system, shows references to a four-speaker setup, new calibrations, and a "Party Mode."
HomePod owners have been clamoring for a more robust sound system since the original model debuted in 2017. Stereo pairs are phenomenal, but lack the robust audio capabilities of full surround sound systems.
According to a post on the MacRumors forums from user pdfu, the code is available in audioOS 27. It can be found in beta 8 for the second-generation HomePod.
First, there are direct references to tuning files that reference front and rear left and right positions. Front HomePods will handle the audio as usual, while rear HomePods will attempt to fill the space with omnidirectional audio.
These settings only apply to second-generation HomePods but do reference an unreleased model, which may be the new HomePod mini expected later in 2026. The rear channels would also be used for system sounds and Siri.
Depending on what is being played, the HomePods would work together to sync audio for the best effects. Movies and multi-channel audio get dialogue processing, bass management, and dynamic range control.
Spatial audio is also at play, syncing audio differently based on if it is on or off.
Party Mode appears to be a new setting for stereo-paired HomePods. It would focus on spreading the audio around more ambiently rather than focusing on centering the mix on a single perfect listening point.
There is no indication of these features arriving with the OS 27 release cycle. Given the references to unreleased hardware, the features could be waiting on the new HomePod mini, at the least.
