You know, every now and again, I get a little bored. When that happens I occasionally find myself hunting down obscure videos that are capable of inducing any kind of emotional response.
I think I may have found one video that shines out to me far brighter than any other. Do you know what a Tesla Coil is? If you don’t then Wikipedia can shed some light on them for you.
If you are willing to spend a lot of time and effort thinking, as well as working through some rather complicated mathematics you can tune the sound of a sparking coil to a certain pitch. Now for just one pitch this would be rather impracticle when we have sound synthesizers that can do it instantly, but if you want to put a little more work in you could make it play a tune.
But if you really wanted to show off, you could set up 2 Tesla coils together and make them play a stirring duet!