In the world of music the Viennese horn is known for its particularly colorful tone. In modern orchestral practice, however, it is a rarity – only very few European orchestras still use it (e.g. the Vienna Philharmonic). It is regarded as a very difficult instrument to play, but the sound contains a greater number of harmonics and therefore has a brighter sound when compared directly to the double horn. As an alternative, the Vienna Symphonic Library also offers the triple horn.