Flute hyperbass are other rare forms of the flute pitched two, three, and four octaves below middle C respectively. Other sizes of flutes and piccolos are used from time to time. A rarer instrument of the modern pitching system is the treble G flute. Instruments made according to an older pitch standard, used principally in wind-band music, include D piccolo, soprano flute (the primary instrument, equivalent to today's concert C flute), F alto flute, and B bass flute. The bamboo flute is an important instrument in Indian classical music, and developed independently of the Western flute. The Hindu God Lord Krishna
Irish flute D wooden flute more closely mirrors a concert C modern Boehm system flute in the pitches achieved in its fingering positions as opposed to a simple system flute pitched in C. Theobald Boehm completely redesigned the flute to more easily access the chromatic scale. The Boehm flute has a cylindrical bore (with a parabolic bore in the head) and uses keys to enable the tone holes to be in the ideal place and to be of the ideal size. Despite the implication of this commonly used name, the Irish flute is not an instrument indigenous to Ireland. The simple system,