audioOS 17.2
Apple does not specify what’s included in the HomePod 17.2 software, and the generic release notes only say that it includes bug fixes and performance improvements.
All I know is that it’s 2.6 GB, took a really long time to install, and doesn’t fix the bug with not being able to play music that I bought from the iTunes Store.
Previously:
For me HomePod 17.1 made Siri (or the microphones?) very unresponsive; I had to literally yell at times to get my message through. 17.2. fixed that for me, so I can testify for the performance improvements bit.