Contra-alto flute repertoire for bass flute and contrabass flute see: Peter van Munster, "Repertoire Catalogue for Piccolo, Alto Flute and Bass Flute", Roma: Riverberi Sonori, 2004. More and more flute ensemble repertoire is incorporating the contra-alto flute. Typically, it is doubled with the contrabass (and/or bass) flutes, however, in recent years, composers and arrangers such as Alexandra Molnar-Suhajda and Judy Nishimura have been pushing the boundaries of lowness by writing independent parts for the instrument. Contra-alto flute The contra alto flute is in the key of G (or sometimes F), pitched one octave below the alto flute - which is a fourth
Hyperbass flute wood. There appear to be wide tone holes, made from standard tee fittings, but without keys; these are covered with the palms of the hands. The first known example of the instrument was built by Francesco Romei, a Florentine craftsman, for Italian flautist Roberto Fabbriciani. Fabbriciani is the inventor and primary performer of this instrument. He calls it "hyperbass flute" and "flauto iperbasso" in Italian. Low flute specialist Peter Sheridan commissioned the first fully chromatic hyperbass flute from the Dutch maker Jelle Hogenhuis in August 2010. The first composition for the hyperbass flute with live electronics and magnetic tape is