A beautiful effort. You're showing us an abundance of imagery in a muted blue light, suggestive of the moment when the piano is cooling down and the resplendence of its music slips away, ceding to ordinary awareness. Suddenly we feel the air.
There's also something sombre here in relation to music, as well as a feeling of difficulty. This silence isn't entirely still. It's introverted, yearning after something known intimately and deeply.
The composition seems imperfect to my eye. I think we see too much of the side of the piano behind the figure. However, in trying to imagine it otherwise, it occurs to me that a certain disjointedness may be essential to the concept you want to communicate, and you would risk losing that if you opted for a more ambiguous posture or another positioning. Hmm.
I like the way the photo wavers between the romantic and the surreal. Mostly I like the feeling, though. It feels like an authentic portrait of melancholy, which is a testament to your skills as an artist.