Vocal Lab helps you train to sing on key. It listens while you sing anddisplays the pitch of your voice on a graph, in real time. All you haveto do is watch the graph while you sing and try to stay in tune. VocalLab can help identify many problem areas in your singing. With a littlepractice you can greatly improve your intonation. Vocal Lab can also beuse to help you play many instruments with better intonation - Violin,Brass, Woodwinds