This app was mentioned in 12 comments, with an average of 1.42 upvotes
TagMusic: https://play.google.com/store/apps/details?id=in.denim.tagmusic
Clean interface, no ads, SD card support, entire Artist or Album edit, folder browsing. The only music tag app I'd ever recommend.
Is your music stored on your SD card? If you edit the tags on apps like blackplayer or most music players, they can get messed up because those apps don't have writing privileges to the SD card (they never prompt you).
If your music is not on your SD card, it could be that the file types (m4a, etc) are not supported by your music player tag editor. Also Most of them don't edit the song data just what is displayed on the app itself.
Check out the TagMusic app: https://play.google.com/store/apps/details?id=in.denim.tagmusic
It does actually edit the song data, and from the SD card too. Plus it always finds the best quality artwork for albums. You can edit songs individually or entire albums.
I use TagMusic
TagMusic shows bitrate in song info.
there is a full version of it this is the lite The Full Version