The quick and easy way for anyone who loves singing to master their voice now! Jeffrey Allen's celebrated vocal method Secrets Of Singing (SOS) is revolutionizing voice training for the stage and studio. A complete, step-by-step guide, SOS provides everything you'll need to gain technical mastery over your voice and allow easy access to it's prized upper range. Whether you're singing for pleasure or for profit, SOS will give you the know-how to practice, audition, perform & record professionally