audioOS 9.9.16.3.1 (build 20K661) is an official Apple over-the-air update for the HomePod, released on 2023-02-06T18:19:46Z. The update package is 1.49 GB. This is a delta (partial) update that requires 14.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 28ccfc78fa0f960ae55ba357f59edc8443d190d8.zip.