Justin was excited. One of his sisters he had watched at the last rehearsal before this, who hadn't gotten all of her skills down path. That was Annabeth. She was still making petty mistakes. One that had to do with mental strain rather than physical when her hand would stop and hover over the string that she was supposed to be playing at that moment.
Her playing was smooth and sweet when she did though. It flowed like a steady river and was as sweet as ice cream eaten by the side of the river on a Sunday afternoon. It was the best feeling ever. It was just like the playing of the actual owner of the instrument, long healthy notes, and quick short ones. A skillful hand at playing whatever it is given.
