Hey, I can't remember the name of this fic, but I do remember some scenes from it.
Octavia visits Vinyl sometime after she marries a stallion
She then finds that their former home is in impeccable condition.
She looks for Vinyl, finds some albums she made (I remember one was entitled "Missed Chance" or something along the lines of that).
She then finds Vinyl herself either dead or unconscious and holding a piece of paper.

I read it a few years back, can anyone help?

5967843 If I'm not mistaken the story you're looking for is called Songs of Sorrow by Syvvak and is a sequal to Autograph.