Simple now playing app for macOS.
It should work with every player, just search for how the player is handling your open music file.
In the inform player, it should be wrote this way: player, index (without .).
The index should be the index from the music playing, from the files open by the player process.
For example, for deadbeef it would be: deadbeef, 0
for foobar2000 it would be: foobar2000, 16
Uses UTF-8 encode, so it work's with asian letters.