audioOS 9.9.15.3 (build 19K547) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2022-01-26T18:16:49Z. The update package is 1.11 GB. This is a delta (partial) update that requires 14.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2b4f85d287c6f90252a1a213413fa5807a5e9c80.zip.