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