J.S. Bach’s Mass in B minor is considered one of the greatest masterworks in the choral canon, and was described by one scholar as “a summary of [Bach’s] writing for voice." Albany Pro Musica presents a performance of the B Minor Mass on Sunday, April 28 at 3pm at the Troy Savings Bank Music Hall. We spoke with Albany Pro Musica’s Opalka Family Artistic Director Jose Daniel Flores-Caraballo and one of the singers in the ensemble Michael Wolff, who was a member of the group when they performed the work 40 years ago.