audioOS 9.9.15.1.1 (build 19J582) is an official Apple over-the-air update for the HomePod, released on 2021-11-03T17:10:23Z. The update package is 981.07 MB. This is a delta (partial) update that requires 14.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 09e1e9cb2637f428086c6c0b6b4f64f8e1c668e4.zip.