Such a disappointment; only ZTE's music app can use the hi-res DACs; and that one is ridiculously limited:
-can't play hi-res dsd files
-does not have a search feature
-all folders are listed in alphabetical order, which makes it an ordeal to locate an album or artist by folder
-within a folder or album, the songs are listed in alphabetical order only - so you cannot properly listen to an album
-even if you were to use an external file manager, and set ZTE's music as default player, when one sends a file to play, the zte music app does not open properly. This would be a first workaround to make it useable.