Op. 120, No. 1 (Berio)

Op. 120, No. 1 is a piece composed by the Italian composer Luciano Berio, specifically his "Sequenza IX" for solo clarinet. The term “Op. 120, No. 1” may be a mislabeling, as Op. 120 generally refers to a set of works by Johannes Brahms, which includes two clarinet sonatas.