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
Double contrabass flute large flutes. Despite the tendency of the larger sizes of flute to be softer than their higher pitched relatives, the double contrabass flute has a relatively powerful tone, although it usually benefits from amplification in ensembles. The Japanese firm of Kotato & Fukushima sell their double contrabass flutes for US$38,000. Their main use has been in large flute choirs and occasionally in film scores. A double contrabass flute constructed of PVC, called a subcontrabass flute by its maker, the Dutch instrument maker Jelle Hogenhuis, has the tubing in a notably different arrangement from its metal counterpart. Although the PVC instrument