I play concerts for a living , so you wouldn’t think I’d need reminding of the dramatic difference between listening to a recording and hearing a live performance. But it was as an audience member, recently, not as a performer, that I had my reminder – and it was a pretty spectacular one, because I was lucky enough to attend a concert by the Chicago Symphony Orchestra. The orchestra played music by Schubert and Carl Maria von Weber, and they premiered a wonderful new piece by my good friend Max