Come join the Nashoba Valley Chorale as it celebrates its 50th anniversary season. The performance will include music by Bach and Britten and will close with Beethoven’s magnificent Mass in C, featuring four professional vocal soloists and full orchestra. The concert’s repertoire “reflects the different aspects of our history and showcases where we are now,” says Anne Watson Born, the group’s musical director. Beethoven Mass in C Britten Rejoice in the Lamb Music of Bach, Vivaldi, Thompson, and Woo Pay what you can.  Tickets: www.nvcsings.org