Apple's latest software update for the HomePod brings a new Sound Glow feature to the HomePod, HomePod mini, and HomePod mini 2. Apple introduced Sound Glow as a HomePod mini 2 feature, but it's available for the second-generation HomePod and the original HomePod mini too. HomePod Software 27.2 is available as a release candidate update for developers and public beta testers, but it should launch next week.