American Popular Repertoire - Level 1 - Book & CD. Each repertoire album contains a wide selection of pieces in three distinct categories; Lyrical develops beautiful tones, reinforces careful listening, nurtures musical expression: Rhythmic Instill a steady beat, improves counting refines articulation: Ensemble hones listening skills, encourages regular ensemble playing. The CD provides convenient practice and performance tempos for realistic support of the learning process, and More.