Helmuth Rilling, one of the world’s renowned Bach interpreters, cofounded the Oregon Bach Festival in 1970. He concludes his tenure as artistic director with the B Minor Mass, the grand and glorious summation of Bach’s life, faith, and craft. Fronting the orchestra and chorus are soloists Julia Wagner, Roxana Constantinescu, Nicholas Phan, Tobias Berndt, and Tyler Duncan. Join us for the Portland performance of the emotionally charged Festival finale. Rilling and forces reprise the program July 14 in Eugene as the Festival finale. Tickets $78, $65, $53, $42, $29. Now on sale to contributing Friends of the Oregon Bach Festival. Sale to broad public begins May 14. At Arlene Schnitzer Concert Hall, 1037 Southwest Broadway, Portland, 97205.