Clarinet virtuoso Iwan Müller succeeded in developing the possibilities of his instrument beyond its limitations in Mozart’s time into the modern clarinet, though his compositions have long been overlooked. The beautifully proportioned Clarinet Quartets Nos. 1 and 2 form a complementary pair, placing lyrical ease and virtuoso refinement into ‘impossible’ keys as a demonstration of Müller’s innovations. The remaining works often follow an Italianate bel canto style, while his popular Souvenir de Dobbéran is a prototype of the musical postcard genre.