Mutatis Mutandis is a work for orchestra scored for piccolo, two flutes, three oboes with third doubling on english horn, two clarinets and a bass clarinet, three bassoons with third doubling on contrabassoon, four horns, three trumpets, three trombones and tuba, timpani, three percussionsits, one piano doubling on celesta, harp, and a large standard string section. The score is in C.