I know the OP posted quite a while ago, but I wonder if, in addition to being in the wrong program, etc., part of the procrastination is a response to any sort of "I have to blah blah blah" mentality? I recommend a book called "why we do what we do" by Edward Deci.
My own experience is that I grew up internalizing all the "you must" and "you have to" and "there is no other option." I did well in a number of things that I really loved and still love. But as I get older and becomes more convinced that life is not about accumulating accomplishments, my urge to subvert all the "you must" outgrows my ability to self-discipline. I am now in an MA program, in a field (let's call it field that is entirely unrelated to my trainings as an undergrad and through my first master's. My first year, first masters in field A I experienced exactly the same thing as OP. By the end of that year, I became fully convinced that I was in the wrong field, and decided to go into field B. My second year of master's in field A was the best year ever as I apply to programs in field B, because at that point, filed A was no longer something I must do. My growth in that one year in field A was incredible. I started the MA in field B, and as soon as the novelty wears off, I find myself in exactly the same place two years ago, feeling uncertain about field B, except now I am also toying with the idea of going back to field A. I spent two months in a funk, thinking that I was depressed, and simultaneously feeling very guilty about not devoting entirely to field B and very sad about leaving field A, and I spent a lot of hours trying to figure out how to get back to field A.
And you know what? I made an official commitment to keeping one foot in field A a while ago. As soon as that happens, I stopped daydreaming about going back to A. In fact now I have little motivation to go through with that commitment. It revealed to me that my aversion to any external "have" "music" "absolutely" is so strong it will, and it does, get in the way of my intrinsic motivation. So I stopped worrying about any sort of "as a grad student in B you have to do this and that and you must be blah blah and yada yada" and just did my thing. And it worked.