In the beginning, you needed this thing to make computer music.
Researchers in New Zealand have restored the world's first recording of computer-generated music, created in 1951 by the computer scientist famous for breaking the Enigma code. Alan Turing recorded the first ever algorithmic composition in Manchester, England, using the gigantic contraption pictured above (for more details, see below). As you will notice, the journey - which paved the way for everything from synthesisers...
Check out how you can play a whole orchestra with a single acoustic guitar.
… and yet another creates and rides his own low cost one. Decide for yourself which one is better.