There is the syncthing-fork that as far as I know is continuing, with the added bonus that it supports a 1-way sync by ignoring deletes on the phone side, so you don’t have to store your whole music collection on your phone if you don’t want to.

I’m not familiar with easyeffects, I use a computer to watch media content and always have to adjust my volume for loud gunfire or soft dialogue. Does easyeffects have a volume normalization setting I could use to smooth out my media volume?