The Newburyport Choral Society is scheduled to perform its annual spring concerts at the Belleville Congregational Church, 300 High St., at 8 p.m. May 4 and 2:30 p.m. May 5. Under the baton of music director Gerald Weale, the 100 voices of the choral society will be joined by an orchestra and professional soloists. They will perform a diverse selection of music by Austrian composers Wolfgang Amadeus Mozart and Franz Joseph Haydn. For more information, or to purchase advance tickets, visit www.newburyportchoralsociety.org or call 978- 462-0650. Advance tickets cost $22 for adults, $20 for students and seniors. Tickets at the door will cost $25 per person. The Newburyport Choral Society is an educational, nonprofit organization that has brought choral music to North Shore audiences for nearly 80 years. In two concert series each year, the society presents choral music programs accompanied by professional soloists and orchestras.