Tilson Thomas has conducted a wide variety of music and is a particular champion of modern American works. He is also renowned for his interpretation of the works of Gustav Mahler; he has recorded all nine Mahler symphonies and other major orchestral works with the San Francisco Symphony. These recordings have been released on the high-resolution audio format Super Audio CD on the San Francisco Symphony's own recording label. Tilson Thomas is also known as a premier interpreter of the works of Aaron Copland, Charles Ives, and Steve Reich.