(Music Express Books). Have fun with your choral warm-ups! With this collection of fifty-four inventive and educational songs and exercises, your choir will beg for more. Start out with the unison pieces and "build" to the more challenging exercises for 2-part, 3-part or 4-part treble or mixed voices. Use the demonstration CD for quick learning or sing along with the recording to have hands-free, portable warm-ups at your fingertips every day. Developed and composed by the award-winning choral composer and master teacher, Rollo Dilworth, Choir Builders will prove to be a "fun"damental way of improving and sustaining a quality choral sound with your performance groups.