Xennial as well. My first home PC was an Epson with 640k and a 3.5 DD disk drive and a "Turbo" button on the front of the case.

I remember getting a kick out of a game that used RealSound, a piece of software for doing voice and other similarly complex sound out of the standard PC speaker (apparently it handled 6-bit PCM audio, though I wouldn't know that at the time).

That game included a card explaining how to improve the audio out of your PC by building a cable to connect the line going to your PC speaker to an RCA cable to connect it to a stereo or boombox. The cable wasn't great at what it did (and better designs had been devised since), but it was pretty simple (if I remember right just some RCA cable, a couple of alligator clips and a capacitor).