SSA or SATB, piano, and optional bass and drumkit ad lib. A highly original and effective concert setting of the Latin Missa brevis in which the various movements embrace a variety of jazz styles. The characterful piano accompaniment can be played as written or serve as a guide, and bass and drums can join in ad lib. The bass part is notated with chord symbols and may be played as written or used as a guide from which the player may improvise freely.