The Roland VT-12 Vocal Trainer is a compact, battery-powered "pocket vocal coach" designed to help singers improve their pitch, timing, and harmony skills. Originally released by Roland in October 2012, it integrates an active vocal pitch tracker, metronome, recording playback loop, and a built-in educational curriculum into a single portable chassis.

Key Features & Capabilities

• Dual-Singer Pitch Detection: Tracks and displays the pitch of two singers simultaneously, allowing partners or choral singers to check two-part harmonies.
• Visual Intonation Feedback: Features an illuminated LED meter that indicates flat (b) or sharp (\(\#\)) variations in real-time by half-step increments.
• Pitch Detection Modes: Includes Mono Equal Temperament (single voice), Chord Equal Temperament (two voices), and Chord Just Intonation (major chords).
• Onboard Repertoire & Exercises: Packed with 50 world-standard Concone Op. 9 Fifty Lessons classical voice etudes alongside audio warm-ups, backing tracks, and guides.
• Instant Review Feature: Automatically tracks your performance against internal backing melodies and provides instant playback feedback via a single button.

Physical & Technical Specifications

Dimensions70 × 134 × 28 mm (2.8 × 5.3 × 1.1 inches)

Weight150 g (6 oz) including batteriesPower Source2x AA batteries (~6 hours alkaline life) or optional PSB-6U AC adapterDisplay7-segment, 3-character LED pitch indicatorAudio Inputs1/4" Input Jack, 3.5mm Stereo Mini REC INAudio Outputs3.5mm Stereo Headphone/Output Jack, Mono Built-in SpeakerUser Memory10 user tracks (maximum 10 minutes recording time per track)Metronome Tempo30 to 250 BPM with Tap Tempo functionalityIn-Box Accessories

• Companion training book from Berklee Press (Vocal Workouts for the Contemporary Singer)
• Moveable "Do" Solfége attachable faceplate template
• Doremi sheet, tracklist guide, and 2x AA batteries