"No, it's fine." He so wasn't ready to hear Barry sing or play anything, because whether he was good or bad, it would have effects he really didn't want. A distant, pleasant crush, was that really too much to ask for? Hartley couldn't think of a reason to tell him not to come, so here he was, stuck. "Of course you can come watch. It's not going to be very interesting, I just try to get some free time every day." Free time was practise time for him.