I have a bunch of WMAs from online stores that use that format, as well as a period when I was ripping to that format (different topic). In the Windows OS, MP3s display tag information such as BPM but WMAs do not. Given that WMAs are a Microsoft format, this is a bit surprising to me. All my WMAs are DRM free, so they are writable.
Does MC write this information to WMAs? Can WMAs store this information in their tag? Is there a list of tags that are and aren't embedded to WMAs by MC? It's really nice, BTW, that MC ratings are now visible to the OS.
I really don't want to convert all my WMAs to MP3 as the solution to this. Aside from the fidelity problems of converting one compressed format to another, it would be nicer to leave sleeping dogs lay.