Really cool idea and well executed. Love the head tilted down a bit and the b/w treatment. I might like the angle of the shot moved just a bit to the left to crop a bit off the right and give the shadow "bell" just a bit more room. Very nice that way it is as well.
It's a beautiful image and a clever shot. The hat, glasses, and jacket all work well. So does the lighting. I wonder whether the dark brooding sensibility characteristic of effective blues might not be more accurately expressed if the wall were just a little less starkly bright or the shadow a little less contrasty. The blues trumpeter is being upstaged by his shadow - an apt concept (see also Steely Dan's Deacon Blues "This is the day of the expanding man..." ) but not sure it gives the best visual result. Just thinking out loud. Hope this helps.
I would have voted a higher mark if you had the shadow in focus and allowed the player to be out of focus, this would have given them equal weight and offered the viewer a choice of who to listen to..so to speek.
Outstanding use of lighting! The shadow makes (is) this photo, as does b&w. Great charactor study. Like the grain in it. The spots may be a tad distracting, but gets a high score from me! Well done.