Apple has released HomePod Software Update 27 for HomePod and HomePod mini.
This update introduces support for AutoMix with Apple Music, which transitions between songs like a DJ does, time stretching and beatmatching to deliver a continuous playback experience. It also delivers improved AirPlay performance, providing faster and more responsive connections when sharing music from iPhone, iPad, or Mac, and provides bug fixes and security updates for your HomePod.
HomePod software updates are normally installed automatically. To check manually, open the Home app on an iPhone, iPad, or Mac, select Home Settings, choose Software Update, and follow the onscreen instructions.