audioOS 9.9.15.1.1 (build 19J582) is an official Apple over-the-air update for the HomePod mini, released on 2021-11-03T17:10:31Z. The update package is 1.12 GB. This is a delta (partial) update that requires 14.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 24cad823945cf5dae30ddc1bdfbe7e74edd1fe79.zip.