Sony's decision to drop the Walkman brand from its music app left people strangely upset, but maybe this will cool some hot heads. The latest update of the beta music app adds Google Cast support. It's "experimental," but it's better than nothing.
Here's the full changelog for the new version. It's more than just the casting support, but not much more.
- Google Cast support (Experimental feature)
- Crisper album art in lock screen (Lollipop devices)
- Download music info moved to Settings
- Misc bug fixes
You need to have a Sony device to use the music app, just like when it was still called Walkman. You also have to request access to the beta community to see the post linked below or install the new build. If you don't want to do all that, there's always APK Mirror. It still won't work on non-Sony devices, though.