Musical Instrument Digital Interface, or MIDI, as well as MIDI controllers, represent a revolution in how we create, perform, edit and record music. This is even more true with each passing day as computers become more powerful, compact and pervasive.
At its core, sound is analog. That is, sound waves can exist in infinite combinations. This is necessary for sound to seem rich and unique, but it makes recording and transmitting much more difficult.
This is where digitizing and MIDI come in. By breaking down sound into various qualities, and by representing each with a number, we gain an ability to create and transmit sounds in a way that would be quite difficult were we working with infinite possibilities.