8-bit music or chiptune is something that any of us growing up with the early video game consoles will be familiar with. Computers were able to make sounds by using a waveform generator. Early computers were limited on the sounds they could make. Generally just a beep or tone. But programmers eventually learned out to program more complex sounds and even music. The early years of arcade games started featuring music and sound effects.
Video game makers began to include multiple sound chips to achieve more complex sounds. By the time the Nintendo Entertainment System went mainstream in the mid-80s, the sounds the programmers could generate would become iconic. Imagine the sound of Mario jumping to collect a floating coin?
Have a listen to this to podcast called Twenty Thousand Hertz. This episode is all about the nerdy history of 8-bit sound and video game music.