In The Facebook Dilemma I wrote about the conflict between being a content creator originating posts on Facebook, and advocating that people should stop donating their time, attention, and behavioural signals to that enterprise.
The question is as hard as ever to solve, and I realise that doing the right thing™ requires sacrifice. Not easy in terms of answering "but how will I reach people now", but then, against "why does Facebook only surface my posts to half my page fans unless I pay", it's not so hard to process. If people are interested enough in my music content, I'm not stopping anyone from posting about it on Facebook.
Better focus on creating the music itself.