Hi,
New to list, looking for help with terminology and finding sample CoreMidi code.
I've got some working code (in Python) that reads a MIDI file containing a single part, e.g. a bass line, and writes an output MIDI file containing that part plus harmonies with good voice leading. It's a useful tool for my own composition, arranging and exploration of different algorithms for harmonization. I'm looking to make it more convenient to use with Logic 9. At present, I have to play in the line to be harmonized in one track, save the region as a midi file, run my harmonizer from the command line and then go back to Logic and manually load the output file into another track. Not exactly a high-productivity workflow :-)
I'm looking for some sample code I can wrap around the harmonization algorithms so I can
1) Play a line on a MIDI keyboard and send the harmonized output to Logic, i.e. as it would see it if I were actually playing all the notes, and
2) Be able to send a pre-recorded MIDI track in Logic to the harmonizer and have the harmonized output written to another track.
This brings up my first terminology question: is what I want to develop an AudioUnit or some other kind of plug-in, since it wouldn't produce any audio but simply transforms a MIDI input stream into a different MIDI output stream?
Links to relevant docs and examples much appreciated. I want to focus on the musical aspects of this project and minimize the time spent learning the quirks of Objective-C, XCode, and Apple Framework API's.
I have XCode 3.2.5 installed on my MacBook from a couple of years ago (I'm still running Snow Leopard). I'm registered as an Apple Developer but make my living writing Unix/Linux software for embedded applications.
Thanks!
Mike Ellis