Groene Paviljoen, Baarn, the Netherlands. Written in 1894, the two Clarinet Sonatas, Op. 120 are the last chamber music pieces Johannes Brahms composed. In this performance at Het Groene Paviljoen in Baarn, the Netherlands, clarinetist Henk de Graaf and pianist Daniël Wayenberg play Brahms's Clarinet Sonata No. 1 in F minor, Op. 120.