A few VIC-20 games, including [Scott Adams] adventure games, worked with the Votrax speech synthesizer by sending phonemes as text over the expansion port. From there, the Votrax would take care ...

The Vic-20 is a great little 8-bit computer that never seems to get the love it deserves. In addition to boasting plenty of fantastic original games ... were Scott (or Alexis) Adams’ creations ...