Roland VT-4 Voice Transformer Vocal Effects Processor

The Roland VT-4 is a compact, hands-on voice transformer and vocal effects processor designed for musicians, DJs, producers, streamers, and podcasters who want real-time vocal transformation without complex menu navigation. Five effect categories — Robot, Megaphone, Vocoder, Harmony, and Reverb — each offer four distinct variations, enabling everything from sci-fi robot voices and vintage talk-box simulations to tight four-voice harmonies and lush reverb and delay effects. Eight scene memories allow instant recall of favorite configurations.

The rear-panel combo XLR/TRS input accepts balanced microphone signals with up to +48V phantom power for condenser microphones, while a front-panel 1/8-inch input with plug-in power accommodates lavalier and headset microphones. Dedicated real-time faders for Pitch and Formant enable expressive, continuous voice morphing without artifacts. A MIDI keyboard connected to the MIDI IN jack lets the Vocoder and Harmony effects track chords for dynamic, performance-triggered harmonization.

The VT-4 functions as a full 24-bit USB audio interface at sample rates up to 192 kHz, making it directly compatible with any DAW on Mac, Windows, or iOS via USB Type-B connection — no drivers required on most platforms. Power options include four AA batteries (≈4–7 hours depending on type and phantom power usage) or USB bus power from any USB port. 1/4-inch TS line outputs (L/MONO and R/BYPASS) and a 1/8-inch headphone output complete the connectivity.

Key Features

• 5 effect categories × 4 variations: Robot, Megaphone, Vocoder, Harmony, Reverb/Echo/Delay
• Real-time Pitch and Formant faders for expressive voice morphing
• Rear combo XLR/1/4-inch TRS balanced mic input with +48V phantom power (10 mA max)
• Front 1/8-inch input with plug-in power for lavalier/headset microphones
• MIDI IN for keyboard-triggered Vocoder and Harmony effects
• 24-bit USB audio interface at 44.1, 48, 96, and 192 kHz; USB Type-B connector
• 8 scene memories for instant preset recall
• Battery powered (4× AA, 4–7 hrs) or USB bus powered; Auto-Pitch hard-tune knob

Technical Specifications

• MIC IN (Rear): Combo XLR / 1/4-inch TRS phone, balanced; Phantom Power +48V / 10 mA max; Input Impedance 4.4 kΩ; Nominal Level –40 to –12 dBu (variable)
• MIC IN (Front): Stereo 1/8-inch (3.5 mm) miniature phone, plug-in power; Input Impedance 2.2 kΩ; Nominal Level –40 to –12 dBu (variable)
• MIDI IN: 5-pin DIN connector
• LINE OUT L/MONO: 1/4-inch TS phone jack, Nominal Level –10 dBu, Output Impedance 1 kΩ
• LINE OUT R/BYPASS: 1/4-inch TS phone jack, Nominal Level –10 dBu, Output Impedance 1 kΩ
• PHONES: Stereo 1/8-inch (3.5 mm) miniature phone jack, Output Impedance 24 Ω
• USB Port: Type B
• USB Audio: 24-bit AD/DA; Sampling Rates: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz
• Effects — ROBOT: Normal, Octave–1, Octave+1, Feedback
• Effects — MEGAPHONE: Megaphone, Radio, BBD Chorus, Strobo
• Effects — VOCODER: Advanced, VP, Talk Box, Spell Toy
• Effects — HARMONY: +5, +3, +3/–4, +3/+5
• Effects — REVERB: Reverb, Echo, Tempo Delay, Dub Echo
• Scene Memory: 8 presets
• Power: 4× AA alkaline or Ni-MH batteries; USB bus power; Current Draw 500 mA
• Battery Life: ~4–7 hours (varies by battery type and phantom power use)
• Width: 174 mm (6-7/8 inches)
• Depth: 133 mm (5-1/4 inches)
• Height: 58 mm (2-5/16 inches)
• Weight: 554 g (1 lb 4 oz) including batteries
• What's In The Box: Owner's Manual, Safety Leaflet, 4× AA Alkaline Batteries