The Rite of Spring composer Julius Harrison acknowledged the uniqueness of the work negatively: it demonstrated Stravinsky's "abhorrence of everything for which music has stood these many centuries ... all human endeavour and progress are being swept aside to make room for hideous sounds ..." In "The Firebird", Stravinsky had begun to experiment with bitonality (the use of two different keys simultaneously). He took this technique further in "Petrushka", but reserved its full effect for "The Rite" where, as the analyst E.W. White explains, he "pushed [it] to its logical conclusion". White also observes the music's complex metrical character, with combinations of duple and
The Rite of Spring Rite" in the autumn; the sketchbooks indicate that he had finished the outline of the final sacrificial dance on 17 November 1912. During the remaining months of winter he worked on the full orchestral score, which he signed and dated as "completed in Clarens, March 8, 1913". He showed the manuscript to Maurice Ravel, who was enthusiastic and predicted, in a letter to a friend, that the first performance of the "Le Sacre" would be as important as the 1902 premiere of Debussy's "Pelléas et Mélisande". After the orchestral rehearsals began in late March, Monteux drew the composer's attention to