audioOS 9.9.16.3 (build 20K649) is an official Apple over-the-air update for the HomePod, released on 2023-01-24T18:07:45Z. The update package is 1.53 GB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 36952867b90197be6c5ff5ea5cfed4d444b17243.zip.