by Often, the music of our youth speaks to us. Sometimes it has specific messages, and sometimes it just reminds us of what it was like when we were young. Sometimes both. I didn’t do a lot of concerts as a teenager, and I really haven’t done that many as an adult, either, but I enjoy music and I enjoy live music, so there’s really no easy explanation for that, other than possibly budgetary concerns at the times when I’ve felt the desire to go see a particular group or artist live. But Peterborough does a series of outdoor concerts every year, free to attend, and works to get some…