Although the principle of non-repetition underlying all of the works in the Soli series is in conflict with the recurring tone rows of twelve-tone technique, the Aria movement of Soli II is an exception. Twelve-tone technique is used throughout this movement. In fact, both the Aria and the Sonatina are based almost exclusively on all-combinatorial twelve-tone rows with inherent repetitive properties. The Aria features solo bassoon, while the Sonatina has the strongest neoclassical overtones, with a waltz-like accompaniment to the agile solo clarinet. The Finale is an extended lament, dominated by the horn.
