VT-4 Voice Transformer The VT-4 is an effect processor for the instrument inside us all—the human voice. View Product VT-3 Voice Transformer With the VT-3, you can smoothly alter pitch and formant in real time to introduce heavily processed vocal sounds into your studio tracks and stage performances. View Product VT-12 Vocal Trainer Pocket-sized vocal training tool with illuminated pitch detection, onboard vocal guides, and backing tracks. View Product