Anyone with a music studio can easily download a .midi file from the internet, and then use it to produce a musical track. A midi file exists online for almost every song in the world, and you can do a song title search along with the keyword midi. It's often an entire arrangement, everything one needs to produce a full blown song, all you need is further programming and studio equipment. One triggers various synthesizers to perform the contents of these .midi files, and it sounds like music.
Midi files contain every note that every instrument in the orchestra plays. Is this "art" or merely raw data? If I can obtain this data online, I won't have a lengthy data entry phase or need to do any composing, but it doesn't sound ethical or legal.
I'd have to get a license from the publisher to sell this new recording, of course. But what about for using someone else's midi from the internet? How do I handle credit or licensing here?