SOLVED. The main character is female then inherits a house\asylum? She flips out of some thing the first night there. Keeps saying before or after the fact. [s]

[Mai]

I think I found it! I searched "horror novel" "asylum" "music box" and this was the first result:
The Dead Girls of Hysteria Hall by Katie Alender
Readers comments:
-Delia Piven and her family arrive at The Piven Institute for the Care and Correction of Troubled Females after Delia inherits the property from her great-great-aunt.
- There’s one creepy yet poignant scene in the book where Delia sits gazing forlornly out the window while turning the crank of a music box. She turns and turns and turns the crank, losing herself in the melody, and when a noise finally rouses her from her trance she finds two and a half years have passed.