The alto flute has become a very popular addition to the flute family. It is an important member of the flute choir, but is also a soloist in its own right.
This instrument is built in the key of G and thus plays a fourth lower than the C flute. It is loved for its earthy, rich tone quality.
Getting used to playing the alto flute requires a relaxed embouchure. In addition, the greater length of the tubing calls for a longer stretch of the arms, but alto flutes with curved head joints are available. Good news for flutists with short arms!
Solo compositions written specifically for the instrument are becoming easier to find as well as inclusion in symphonic repertoire. Perhaps the earliest known use of the alto flute in orchestral music is in Stravinsky's Rite of Spring.