Rochester’s first crazy busy concert week in March begins on a lamb-like day. Tomorrow, look for a cultural announcement from WXXI. On Wednesday, Eastman prof John Graham will pick up his electric viola to reprise Andrew's Colella's powerful Viola Sketches. More later. Tonight, the Rochester Oratorio Society sings at Roberts Wesleyan College in a concert unfortunately named “Choral Triptychs.” I’m singing in it. The music falls a little on the heavy Germanic side with music by Mendelssohn, Bruckner, Rheinberger as well as the flowing, inscrutable Lux Aeterna by contemporary American composer Morten Lauridsen.