The four modes used in this composition are not presented in their usual white-key tonalities, but are transposed to be more band friendly. The modes related to the major scale (Lydian and Mixolydian) are transposed to B-flat major, and the modes related to the natural minor scale (Phrygian and Dorian) are transposed to C minor. Instead of using modal key signatures (one less flat for Lydian and Dorian, one more flat for Phrygian and Mixolydian), the key signature of the closely related major or minor scale is used, with accidentals emphasizing the modal structure. However, the modal inflection note does not necessarily appear in all four movements on every part.
