Apple seems to be laying the groundwork for real HomePod surround sound. Hidden code spotted in the latest audioOS 27 beta points to a four-speaker setup that splits audio across front and rear channels.
HomePod owners have waited years for more than just a basic stereo pair. If this ships, it could finally give Apple’s smart speakers a true home theater option. That would put HomePod in more direct competition with dedicated surround setups.
How HomePod surround sound would work
Surround sound can make movies and TV shows feel much more immersive by placing dialogue, music and sound effects around the listener rather than sending everything from the front. A well-designed system can make it seem as though sounds are coming from different parts of the room, adding a greater sense of depth and realism. For music, it can create a wider, more spacious listening experience.
And HomePods will soon offer this audio feature, if an unconfirmed report pans out. And quite a few early details came to light.
The surround sound effect uses four HomePod (2nd generation) units arranged in front-left, front-right, rear-left and rear-right positions, according to a post in MacRumors forums member pdfu.
While front speakers handle the main mix, the rear units fill the room with omnidirectional audio. Also, each speaker is assigned its own role in the system. Files with names like quad_frontleft and quad_rearright apply tuning for placement near walls, corners and open floor space.
Movie and multichannel audio is reportedly getting dialogue processing, bass management and dynamic range control. There’s also EQ tuning, an immersive spatial mixer and a separate low-latency surround mode that handles faster syncing.
Music playback may also get its own bass, dynamic range and EQ treatment, with Siri and system sounds getting rear-channel mixes.
Apple also supposedly extended its automatic room calibration to work with the new arrangement. The process uses HomePod’s built-in microphones to tune solo and stereo-pair setups on the fly. It also builds a four-by-four map of speaker positions that could enable the system to sense where each unit sits in a room.
New hardware could be involved
Two different configurations allegedly showed up in the audioOS 27 code. The first one — internally labeled SUV — uses four second-generation HomePods.
The other one — called Forklift — pairs two second-generation HomePods as front speakers. But the rear units could come from an unreleased hardware family called AID12007. That identifier doesn’t match any HomePod model on the market. This could mean it’s the next-generation HomePod mini.
But it might also signal an entirely new third-generation HomePod. The code only names the hardware without describing its capabilities, leaving no way to confirm which product it belongs to.
Party Mode spreads the sound around
Apart from the surround system, audioOS 27 also includes a new “Party Mode” for HomePod (2nd generation) stereo pairs. Instead of aiming for an ideal listening spot, the mode appears to use a diffuse rendering style. It spreads music more evenly across a room.
Siri responses and system sounds get the same treatment under Party Mode. The feature seems to be built for casual listening and gatherings rather than sit-down viewing.
It’s worth noting that HomeKit, the Home app and Apple TV currently have no way to identify a four-HomePod system. That means surround sound isn’t something owners can set up today, even on hardware that technically supports it.
There’s also no indication that these features are tied to the public release of audioOS 27.
Given the references to hardware that hasn’t shipped yet, Apple may be holding back the feature. Chances are it could be waiting on a new HomePod model to arrive.
