This is the sound of the 80s to me
Some dude found this aging cassette of Apple’s first Basic operating system. It used to take about 30 seconds to load on the Apple I machine. And it sounds good. The guy created an mp3 of it and uploaded it for everyone to enjoy. It just reminds me of waiting for Manic Miner to load on my ZX Spectrum.
You can read more about it in geek speak right here.