Vocal Aerobics provides 40 weeks worth of practice material. The online audio provides demo tracks of the exercises, as well as backing and demo tracks of the songs. Techniques covered include: proper breathing; chest voice vs. head voice; vowel formation and focus; diction; diphthongs and triphthongs; arpeggios; major and minor scales. Benefits from this complete set of workouts include: beter tone; vocal diversity; improved blending with other singers; ear training; and relaxed singing. The audio features professional musicians performing each track. The audio is accessed through Hal Leonard's popular MyLibrary system using the provided code. The audio can be streamed or downloaded and includes PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.