The VT-3 Voice Transformer is designed to smoothly alter Pitch and Formant and can introduce Vocoder, Synth, lo-fi and other heavily processed vocal sounds into studio tracks and live performances with little hassle.
(2014) Roland AIRA Line of Synth Instruments. In: Musical Merchandise Review, Vol. 173, No. 4, pp. 52. Available at https://openmusiclibrary.org/article/727383/.