The Boy's Changing Voice features 20 selections of art songs and folksong arrangements with a limited vocal range of one octave chosen especially for the adolescent boy's voice during its change from a higher treble register. The complete range of the book falls between the F below middle C to the G above middle C. In addition to Piano accompaniments playable on both your CD player and computer the included enhanced CD also includes tempo adjustment and transposition software for CD-ROM computer use.