Brahms composed for piano, chamber ensembles, symphony orchestra, and for voice and chorus. A virtuoso pianist, he premiered many of his own works; he worked with some of the leading performers of his time, including the pianist Clara Schumann and the violinist Joseph Joachim. Many of his works have become staples of the modern concert repertoire. Brahms, an uncompromising perfectionist, destroyed many of his works and left some of them unpublished. His style was innovative and yet traditional--using old classical forms, but composing melodies that were highly chromatic and that strayed from the traditional bounds of harmony.