[Madeindjs]

I personally use MPV to play my music libraries containing mainly FLAC file and I wrote a plugin [1] using JS to send my listens to listenbrainz.org . It's damn simple, but it worked for the past few months!

[1]: https://gist.github.com/madeindjs/f33225cf4d8fdc9f61e0fe3ebe...