The original score of one of these compositions co
The original score of one of these compositions contained the instructions "wait for nod" to indicate when the orchestra should resume playing. A composition of this type opens with a nine-bar introduction before an A-C-B-A-E motif and presents a D-flat major melodic inversion of one of the works that inspired it. Another one of these compositions was originally composed for two pianos and was premiered by at the Aeolian Hall by Ferde Grofé and Paul (*) Whiteman's orchestra in the concert, An Experiment in Modern Music. A composition of this type consists of twenty-four variations on the last of another composer's caprices, while another opens with a two-and-a-half octave clarinet glissando. For 10 points, identify this kind of composition, exemplified by one "on a theme of Paganini" by Rachmaninoff and one "in Blue" by George Gershwin.
The original score of one of these compositions contained the instructions "wait for nod" to indicate when the orchestra should resume playing.