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 * Onboard audio exercises with guide vocals and backing tracks, plus a companion book from Berklee Press; for warm-ups and basic-level exercises, the pitch meter displays your pitch against the internal guide vocal for comparison * 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 * Review function for instant playback to hear your performance