Monty Python’s Argument Sketch performed with two vintage speech synthesizers

Michael Palin is played by the Dectalk Express
(Perfect Paul modified to sound more like Stephen Hawking)

John Cleese is played by the Intex Talker
(Votrax SC-01A)

Communication with the speech synthesizers is done with CoolTerm:
http://freeware.the-meiers.org/