Roland VT-4 Voice Transformer Microphones Plonk is actually a duophonic

Plonk is actually a duophonic (2-voice) module

Sine and Rectangle

Ultra rugged 14-gauge steel construction for added durability

so the second output can act as master to achieve (A1*B1+C1) + (A2*B2+C2) or (A1 + C1) + (A2 + C2) - a 4 channel mixer

Roland VT-4 Voice Transformer Microphones Plonk is actually a duophonicThe VT 4 is an effect processor for the instrument inside us allthe human voice. And like the human voice, the VT 4 is easy to use, yet devastatingly effective. Whether youre 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 dropping effects like