The 15.5.1 update fixes issues where music could stop playing on Apple's HomePod or the Siri speaker may lose its deep bass after a short time.
Apple releases a fix for interrupting music playback on the HomePod speaker

The 15.5.1 update fixes issues where music could stop playing on Apple's HomePod or the Siri speaker may lose its deep bass after a short time.
You can now ask Apple's Siri assistant to play songs and navigate music using the Tidal service on your iPhone or iPad, but it doesn't work with Siri on your HomePod.
Apple's iOS 15.5 software adds HomePod Wi-Fi signal bars to the Home app, which also now features a notification for critical alerts.
The newly released HomePod software 15.4.1 fixes Siri voice commands not working with some smart appliances that are compatible with Apple's HomeKit platform.
Apple's Siri-powered HomePod mini smart speaker with HomeKit is now available to purchase in the Netherlands, Switzerland and Belgium, in all colors.
Apple's iOS 15.4 software adds Dutch as a new Siri language option for HomePod voice recognition in the Netherlands, allowing multiple people to request personal information from Siri without invading the privacy of others.
Apple is bringing captive Wi-Fi support to HomePod with a pretty smart way to join captive Wi-Fi networks that need additional sign-in steps, like at hotels or dorms.
Updating your Apple wireless speaker to software version 15.3 will let you set up HomePod multiuser with Siri voice recognition in additional countries and languages.
The HomePod mini, Apple's only smart speaker anymore, is available in a variety of different countries across the globe. However, there are still some regions that need coverage. And word on the street is that Apple is looking to launch in seven new countries pretty soon.
Apple today launched HomePod Software version 15.2, adding support for the new $5/month Apple Music Voice plan and more languages for Siri voice recognition.
The holiday shopping season is already kicking off for some folks, and some companies. Apple, for instance, has officially launched its holiday efforts for 2021, which includes a nice new addition to the offerings for customers who are looking to buy some new Apple-branded gear this holiday season.
It's a week for minor software updates, apparently. Following the release of tvOS 15.1.1 to the public, which included a variety of behind-the-scenes fixes but no major new features, Apple is back with an update for the HomePod and HomePod mini.