That looks good. One thing I found difficult when implementing my own music player (https://github.com/albertz/music-player https://github.com/albertz/music-pl

That looks good. One thing I found difficult when implementing my own music player (https://github.com/albertz/music-player https://github.com/albertz/music-player) is to get the playlist right, powerful and efficient, esp when it contains many elements (thousands, maybe millions, or infinite).