MIDI is an software interface that enables you to attach a musical instrument to your computer. But what I'm talking about is tjhe software that creates MIDI music, a simulation of musical instruments. I have friends who are musicians and they tell me that recording a song now doesn't necessitate an orchestra anymore for you can create orchestra music with a MIDI software. And when I heard their creations of minus one music, I believe them. I have tinkered with one MIDI maker and I'd say it's not difficult although you still need to have the talent for making good music.