This is a whole new way of working for me. I usually just start playing with technique or fabric and see where it takes me, but this time, I really have a concept I would like to explore. I'm not sure where to begin, but for now, I will enjoy the music.
I have considered an overlay of chiffon for the smaller notes, but that would mute the background, so I don't think that will work. I suspect that some of this will have to be some kind of applique. I detest fusible, but that may be the only option. There is also the possibility of using paint for the "notes", or maybe even molding paste.
I am in no hurry to do this; I will let the ideas stew until something presents itself.
And in the meantime, play with a new technique---one that you have always wanted to try.
Ta, ta, for now,