A gigantic change between soprano and bass clarinet key work is a key pad played by the left hand index finger with a vent that can be uncovered for certain high notes. This allows a form of "half hole" fingering that allows notes in higher registers to be played on the device. Newer models typically only have one. The second check in key makes the altissimo range much easier to play. As with all wind contraptions, the upper limit of the diversity depends upon the quality of the device and ability of the clarinetist. This gives the bass clarinet a usable range of over four octaves, quite close to the diversity of the bassoon; indeed, many bass clarinetists perform works firstly meant for bassoon or cello as a result of the plethora of literature for those two gadgets and the scarcity of solo works for the bass clarinet. The bass clarinet has been regularly used in scoring for orchestra and live performance band since the mid 19th century, fitting more common in the course of the middle and latter a part of the 20 th century. A bass clarinet is not always called for in orchestra music, but is nearly always called for in live performance band music. In recent years, the bass clarinet has also seen a becoming repertoire of solo literature adding compositions for the instrument alone, or accompanied by piano, orchestra, or other ensemble. It is also used in clarinet choirs, marching bands, and in film scoring, and has played a minor, but continual, role in jazz. The later Romantics used the bass clarinet frequently of their works.