Library
Artwork, album order, multi-disc sets, artists, genres, and search results.
Headroom for Emby
Emby support is in, and it needs testers.
Emby shares most of its plumbing with Jellyfin, so the whole player works with it. I've had far less real-world testing on Emby servers, though, and I won't list it as supported until that changes.
What to try
Run through a normal listening session.
Sign in the way you normally reach your server, browse and search, play a few tracks, seek around, put the app in the background, download an album, relaunch, and check that it plays offline.
Playback
Title, artwork, elapsed time, queue order, pause, seek, and the handoff to the next track.
Accounts
Remove and re-add the server. Nothing from another server should bleed through.
When it breaks
Send a diagnostic report from the app. It includes the failing request without your credentials.
Read this first
This page isn't a compatibility guarantee.
Emby is in the beta so I can find out whether it holds up. If it doesn't pass cleanly on both iOS and Android, it won't be listed as supported at launch.