I think some releases of Raspbian handle audio differently than the previous version. If the use of ALSA or Pulse Audio (or some other software) has changed with Raspbian releases, what do I need to learn that would let me find the answer on my own? I don't like the idea of annoying the community by posting my ignorant questions every time a new version of Raspbian is released.
The first step to find what has changed on a new Raspbian version is to look at the release notes. You will find also a link to it on every image on the download site of Raspbian. For example a quick search on the
release_notes.txt with keyword alsa give me some changes mostly used with bluetooth.