Infocom was and I believe still is part of Activision. The designer of this game, Steve Meretzky, was behind Zork and several other of the biggest games in the earliest days of computer games.
I believe this was an Activision promo shown to retailers.
1 minute 28 seconds
Computers at this time could only make "bloop" and "bleep" sounds so a hardware sound device was included with this game so voice and complex music could be heard.