Octocontrabass clarinet
From Wikipedia, the free encyclopedia
The octocontrabass clarinet (also known as octo contrabass clarinet, octo contra bass clarinet, or sub-contra bass clarinet) is the largest and lowest member of the clarinet family. It is pitched three octaves lower than the standard B♭ soprano clarinet (making it a BBB♭ transposing instrument).
The Guinness Book of World Records lists the octocontrabass clarinet as having the lowest range of any orchestral instrument, capable of playing low B♭ below the lowest note of the piano.
Although only one such instrument was ever produced, by Leblanc, at least three pieces of music have been written specifically for it by Norwegian composer Terje Lerstad (Trisonata, Op. 28; De Profundis, Op. 139; and Mirrors in Ebony for clarinet choir, Op. 134). There is no known recording of the instrument.