Visually check your pitch in half-step increments with the illuminated pitch meter Detects two singers simultaneously for two-part harmony training in equal temperament and just intonation Features on-board audio exercises with guide vocals and backing tracks, plus a companion book from Berklee Press World-standard Concone Op. 9 Fifty Lessons classical voice exercises with piano accompaniment and melody guide tracks; the VT-12 displays the pitch of the guide melody and your pitch simultaneously