[crngefest]

IMHO it’s because audio is „easy“ to manipulate electronically.

You can transform every audio signal into an electronic signal relatively easy - for graphics there is so much more complexity involved just in making them visible.

A speaker that translates electronic signal into sound waves is a super simple contraption at its core.

Edit:/ and audio is striking - it has a profound effect on every human (except deaf of course). If I wanted to demonstrate the power of electronics/computers I would choose audio as well.