Canon for 'Hal' (1982)
Stanley Kubrick's 1968 movie classic 2001: A Space Odyssey included an 'intelligent' human-like computer named Hal, who enjoyed interacting with his creators, playing games, even singing.

In 1982, I used an Atari 800 computer to program an 8-bit pattern-based melody that I wove into a canon form, thinking that Hal might appreciate it's digital language reference. I initially recorded the Atari sounds, then mirrored various tracks to create the cannon. Later I added original electronic sounds.

I was going to send it to Hal, but figured he probably never read his email.