The musical compositions of Gustav Mahler (1860–1911) are almost exclusively in the genres of song and symphony. In his juvenile years he attempted to write opera and instrumental works; all that survives musically from those times is a single movement from a piano quartet from around 1876–78. From 1880 onwards Mahler was a professional conductor whose composing activities had to be fitted around concert and theatrical engagements. Nevertheless, over the next 30 years he produced nine complete symphonies and sketches for a tenth, several orchestral song cycles and many other songs with piano or orchestral accompaniment. Mahler's symphonies are generally on an expansive scale, requiring large forces in performance, and are among the longest in the concert repertoire.