audioOS 9.9.16.1 (build 20K71) is an official Apple over-the-air update for the HomePod, released on 2022-10-24T17:16:53Z. The update package is 1.05 GB. This is a delta (partial) update that requires 15.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c30148bca22486ad183f3e71131860da87dcb487.zip.