A large measure of Mozart's increasing fascination with the clarinet from the later 1780s was due to his interaction with one of the cutting-edge virtuosi of the day, Anton Stadler, for whom both of the works on this CD were composed as well as the Clarinet Concerto, K. 662. Both works are played here by Australian virtuoso, Owen Watkins on reproductions of period clarinets, including a basset instrument, with extended lower range, for the Clarinet Quintet in A major, K. 581. Jaap Schröder, an expert in the violin repertoire of the 17th, 18th and 19th centuries, founded the Skálholt Quartet and lead the Quartetto Esterhazy and Smithson String Quartet, performing and recording classical quartet repertoire for the first time on period instruments. Oboist Owen Watkins has performed and recorded with many premier ensembles in the USA, Europe and Australia, including Boston Baroque, the Handel and Haydn Society, Boston Camerata, Washington Bach Consort, Australian Brandenburg Orchestra, Pinchgut Opera and Orchestra of the Antipodes, Orchestra 1788 and the Cambini Quintet. A faculty member of the Oberlin Baroque Performance Institute for twenty-five years, Penelope Crawford is internationally acclaimed as one of America's master performers on historical keyboard instruments. From 1975 to 1990, she was harpsichordist and fortepianist with the Ars Musica Baroque Orchestra, one of the first period instrument ensembles in North America.