Developing Your Voice for Performance. Enhance your singing career by learning proper vocal techniques to help prevent injuries and maximize your potential. Vocal Technique DVD features exercises that will help you gain technical and expressive command of your voice. Lessons include: warm-ups, posture, breathing, tone, maintaining vocal health, and improving stamina, range and sound. Anne Peckham is a professor of voice at Berklee College of Music. 53 minutes. DVD. ©2004.