Guo Musical Instrument Company Guo Musical Instrument Company Guo Musical Instrument Company (GMIC) is a Taiwan-based musical instrument manufacturer, specializing in flutes, piccolos, flute head joints, and saxophone necks and head joints. Founded by Geoffrey Guo in 1988, GMIC offers its products for sale online and through various retailers all over the world. Some of its instruments include a tenor flute, a G soprano flute, grenaditte flutes and a new C flute design called a Tocco flute. Many of these models of flutes and piccolos come in many different colors. In 2004, Geoffrey Guo and flute professor Mark Dannenbring developed the grenaditte flute. This
Alto flute the bottom octave and a half of its range. It was the favourite flute variety of Theobald Boehm, who perfected its design, and is pitched in the key of G (sounding a perfect fourth lower than written). Its range is from G (the G below middle C) to G (4 ledger lines above the treble clef staff) plus an altissimo register stretching to D. The headjoint may be straight or curved. British music that uses this instrument often refers to it as a bass flute, which can be confusing since there is a distinct instrument known by that name. This