We owe a debt of gratitude to the clarinettist Richard Mühlfeld for making the elderly Brahms so interested in his instrument. in the 1890s the composer wrote the Trio, Op. 114, the Quintet, Op. 115 and the Sonatas, Op. 120 – three gems in the clarinet chamber music repertoire. Brahms also provided a part for viola as an alternative to the clarinet.