D-flat major while for the return of the second theme in the first movement. Claude Debussy also switches from D-flat major to C-sharp minor in the significant section in his famous "Clair de lune". Antonín Dvořák's "New World Symphony" likewise switches to C-sharp minor for a while for the significant section in the slow movement. D-flat major is enharmonic to C-sharp major. In music for the harp, D-flat major would be preferable, not only because harp strings are more resonant in the flat position and the key has fewer accidentals, but also because modulation to the dominant key is easier (by putting
Orchestral Suite No. 3 (Tchaikovsky) the two he had previously written. The problem lay with the opening movement. Titled "Contrastes", it was to be a fantasia of contrasting musical sounds and patterns, not unlike the "Jeu de sons" movement that opened the Second Orchestral Suite. The more he worked with the music, the more recalcitrant the music became and the more he hated it. "Contrastes" finally found its way into the Concert Fantasia. Tchaikovsky's original layout for the Third Suite was similar to that of his Second—a fairly large opening movement as in his first two orchestral suites, then three smaller ones and a theme–and–variations