Contrabass tuba in the orchestra
In orchestral music composers only rarely call specifically for the contrabass tuba. It is usually the musician himself who decides which instrument is best suited for the part.
Instances where the instrument has been called for since the 1880s: Richard Wagner (1813–1883) The Ring of the Nibelung; Anton Bruckner (1824–1896), 7th, 8th, 9th, symphonies; Richard Strauss (1864–1949), Elektra.
Contrabass tuba in wind band music
The usual wind band repertoire.