The mass is scored for a quartet of vocal soloists, a substantial chorus, and the full orchestra, and each at times is used in virtuosic, textural, and melodic capacities. The orchestra consists of 2 flutes; 2 oboes, 2 clarinets (in A, C, and B); 2 bassoons; contrabassoon; 4 horns (in D, E, B basso, E, and G); 2 trumpets (D, B, and C); alto, tenor, and bass trombone; timpani; organ continuo; strings (violins I and II, violas, cellos, and basses); soprano, alto, tenor, and bass soloists; and mixed choir.