Beta 11 doesn't really have anything major, but I did re-add a lot of smaller capabilities from 2.x and finishing implementing some Beta 10 features that weren't completely finished.
Playlist details, bookmark, and folder views all now allow custom metadata lines. One important thing to note is the folder view has 3 separate "types" to customize. There is one for audio files, one for non audio files (playlist files), and one for folders.
Now playing and widgets now support variables for the upcoming / next track.
3.0 Beta 11 (10/20/2020):
New:
Updated libraries
-Added enqueue shuffled to playlists
-Added smart playlist access to android auto
-Track tag changes and rating changes will now refresh the queue
-Playlists can now be renamed
-Added advanced setting 'Broadcast Album Art' under general settings
-Added new metadata variables for the upcoming track (select the help icon for more info)
-Added 'Hide Short Albums' filter to album list (configurable in advanced settings -> library -> album filtering)
-Fixed dynamic theme for details view when using jump to gestures
-Bookmark view will now highlight the playing track
-Added custom metadata to bookmark view
-Added custom metadata to playlist details view
-Added custom metadata to folder view
-Search view will now use custom metadata from each sections associated view
-Added double back to exit setting
-Added default replaygain gain setting
-Added audiofocus duck volume setting
-Added setting to set your starting view
-Added setting to return to now playing after selecting something to play
-Readded 'On Select' options from 2.x
-Added opensl playback setting
-Added UI -> Lock Orientation to advaned settings
-Added 'stop after each track' to advanced audio/playback settings
-Added 'remove after played' to queue -> customize menu
-Added auto bookmark folder option
Fixes:
-Fixed miniplayer seek bar's slow initial progress update
-STOP command sent over bluetooth (or other remote sources) will default to pause gmmp instead of stop
-Fixed some minor issues with enqueue shuffled when currently playing the last track of the queue