Cantemus Chamber Chorus performs its reverently exciting spring program “To Sit and Dream” Saturday, April 30th and Sunday, May 1st. Rhythmically unpredictable spirituals (Tim Harbold), poignant love songs (Libby Larsen), a mystical 20th century chorale (Helmut Bornefield) and a modern canticle (Arvo Pärt) provide awe inspiring music transcending the audience to an ethereal dimension. April 30th, 7:30 at Christ Church, 149 Asbury St., Hamilton and Sunday, May 1st, 4:00 at Central Congregational Church, 14 Titcomb St., Newburyport. Tickets, $15-$20, available on-line, at the door, or at ticket outlets. For details call 1-888-CHORUS 1 or visit www.cantemus.org.