Auxio is an open source, simple, rational music player for Android 5 or later.
https://github.com/OxygenCobalt/AuxioAbout
Auxio is a local music player with a fast, reliable UI/UX without the many useless features present in other music players. Built off of Exoplayer, Auxio has a much better listening experience compared to other apps that use the native MediaPlayer API. In short, It plays music.
I primarily built Auxio for myself, but you can use it too, I guess.
Features
ExoPlayer based playback
Customizable UI & Behavior
Genres/Artists/Albums/Songs support
Extensive queue system
Full playback persistence system
Edge-to-edge (Oreo+ Only)
Embedded covers support
Search Functionality
Audio Focus / Headset Management
No internet connectivity whatsoever
Kotlin from the ground-up
Modular, feature-based architecture
No rounded corners
To possibly come in the future:
Artist Images
Artist Songs
Black theme
Custom accents
Playlists
Liked songs
More notification actions
Swipe-between-tracks function
Better edge-to-edge support
More customization options
Other things, presumably
https://apt.izzysoft.de/fdroid/index/apk/org.oxycblt.auxio
https://github.com/OxygenCobalt/Auxio