Roland VT-4 Compact 5 Hour Battery Life MIDI Control Vocal Transformer (Black)The Roland VT 4 Vocal Transformer is an effect processor for the instrument inside us, all the human voice. And like the human voice, the VT 4 is easy to use yet devastatingly effective. Whether you're a solo electronic artist, DJ, or singer in a band, the VT 4 lets you craft and shape your own unique vocal sounds, from subtle augmentation to radical transformation. Everything is hands on, with no menu diving or programming to get in the way. Jaw