What is the structure of a MIDI file?

Question

I want to manually have a function that creates a MIDI file according to users demands, for example.

User write 2 patches that contain 8 bars of 4 quarters of A4 (Co

Answer 1

Just wanted to add that Somascape has a very comprehensive and well-laid out resource for MIDI file structure and MIDI protocol. (Check out the drop-down menu on their site for additional resource pages). It helped me a lot recently while writing a MIDI framework for Swift.