audioOS 9.9.15.1 (build 19J572) is an official Apple over-the-air update for the HomePod mini, released on 2021-10-25T17:12:30Z. The update package is 972.76 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: 99c081a0bf3f052e08018a38ba93de5a68f46ea7.zip.