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
Bass flute Dutch flute maker Eva Kingma has created a vertical design for the bass flute which allows the weight of the instrument to be supported by the floor. Many composers are beginning to write more pieces for the bass flute. These include Katherine Hoover's "Two for Two", Bill Douglas's "Karuna", Sophie Lacaze's "Archelogos II", Mike Mower's "Obstinato" and "Scareso", Gary Schocker's "A Small Sonata for a Large Flute", Lorenzo Ferrero's "Ellipse" and "Shadow Lines", Sonny Burnett's "Stone Suite", Catherine McMichael's "Baikal Journey" and Ennio Morricone's "Secrets of the Sahara". Other important works include Tristan Murail's "Ethers" for solo bass flute and