Calling All Computer Nerds!

Is this really possible?



And this?



I remember the old floppy drives, and I remember the sounds they used to make, but my mind can't conceive how this kind of sound manipulation is possible!

Thanks to alert reader, Mitch, for sending the first video to me and blowing my mind.

So I ask you, faithful nerd readers, explain to me, in terms a 4th grader could understand, how does this work? Is this a real thing that you can do with just a disc and a drive? Or are they cheating somehow? I must know.

Also, would it be possible to do a duet with a floppy drive and a dial-up modem? Just curious.