Sweeney Todd in Concert [DVD]Amazon. com The San Francisco Symphony Orchestra's 2001 concert production of Stephen Sondheim's witty shocker is musically superb and (even without scenery) theatrically effective. The performers are in costume and use a few essential props such as Todd's razor, but more than these details the quality of their singing and acting makes this production stand out. It looks like a final seal of approval at the end when Sondheim comes out, smiling, to