^
Dominic Milano (1980s).
"Wendy's Moog Synthesizer in 1979". Wendy Carlos. — list & photograph of Wendy's modular, including Moog spectrum encoder/decoder for vocoder
^"EMS Vocoder Demonstration Tape". EMS Vocoder 5000. Electronic Music Studios (London), Ltd. October 14, 1976. Archived from
the original on March 17, 2012. Retrieved March 22, 2012.
^"KROK". Museum of Soviet Synthesizer. — The only Russian rackmount Vocoder, Крок Вокодер