Vibration noises are usually found in the sight.

Take the string and pick it real stiff kinda like a guitar string.... don't draw the thing... just pull it back with your thumb and forefinger about an inch or so and let it thump..... listen for a small buzzing noise.... if you have an extra set of hands at your disposal, have that person put a finger on a couple of different places and see if that stops it.

Now that your string has been settling a bit too... I might have your shop recheck the timing and cam rotation as well.