Mozart only finished a few sections of his Mass in C Minor before abandoning it in 1783; nobody is sure why. But musicians agree that what's left still deserves the work's nickname, "Grand." Even unfinished, the mass is still one of the grandest sacred choral works in the repertory: a synthesis of baroque contrapuntal artistry with Mozartian melody and emotion. Mozart's "Grand" Mass is the focus of this summer's Finger Lakes Choral Festival, to be performed this Sunday afternoon at Hochstein Performance Hall by the Festival Chorus, orchestra, and soloists Laura Heimes (pictured) and LaDonna Manternach, sopranos; Pablo Bustos, tenor; and Eric Trumpowsky, bass. All are led by music director Adrian Horn. Next month, members of the chorus will be flying off to Hawaii for a repeat performance with the Maui Chamber Orchestra and the Maui Masterworks Chorale on August 2.

Finger Lakes Choral Festival presents Mozart's Mass in C Minor on Sunday, July 19, at Hochstein Performance Hall, 50 North Plymouth Avenue. 4 p.m. Free admission. 465-0838; fingerlakeschoral.org.