Werewoolf0, As far as I remember, all this stuff is stored in sdcard / Android / data / _com.maxmp.audioplayer, that is, the program itself does not touch the files with the audio, but associates external data with them, just to avoid some problems. If this folder was deleted, and it most likely happened, since the factory wipe cleans the sdcard /, then there is nothing you can do. In the future, just keep safe this catalog.
And about the possibility of saving to the audio file itself, this is not a very relevant requirement for several reasons: 1) not all audio formats provide for storing the cover and all the more rating (why bother to evaluate a song with a quantitative characteristic? ..) 2) I think this is slightly illegal Otherwise, I could easily assign someone else's work. If you really want to edit the tags and the cover in the file itself, then there is third-party software for this.
Vovannn1979 @ 02.20.2019, 15:56
Is it possible to realize the volume with a large number of steps
If you have a root, then this can be achieved, for example, by installing the appropriate module for Magisk. Sometimes this option is built into custom firmware by default.
Rather, a rhetorical question, but is the lack of a short fading somehow cured when manually switching tracks to a highres output? All other types of attenuation work, android 9, v3 820
Post has been editedFlyingpieceofshit - 20.02.19, 17:34