A musical instrument similar to the traditional flute but easier to play and master has been designed as an introductory flute. The whistle flute can also be used by those who have had difficulty with traditional flute embouchure and/or for recreation, education, music therapy, and stage performance. With greater range, easier handling, and simpler fingering, the whistle flute will augment or replace the recorder style flutes now used in elementary schools. In addition, the whistle flute's inner whistle design could be utilized as a training or transitional mouthpiece for any type of transverse flute.