For example, "E F# G# A B C# D# ^12^ E" plays an ascending E major scale.
CocoaMIDI is public domain. I am quite open to adding features. Or you can also add them yourself :). Source code and a tutorial are available at: http://www-personal.umich.edu/~pdorman/cocoaMIDI/index.html
- Now supports ASCII and UTF plain text files for input