audioOS 9.9.15.5 (build 19L570) is an official Apple over-the-air update for the HomePod, released on 2022-05-16T18:23:48Z. The update package is 1.16 GB. This is a delta (partial) update that requires 14.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c9674df202649fc779f5c3fc033086997aae3f47.zip.