Getting MIDI in from USB MIDI keybord, cocoa mac?

developer.apple.com/library/ios/document... The same exists on Mac as well. If you want to intercept the USB packets, then look at the /Developer/Utilities/USB Prober. App to see the low-level format; but I think you'd probably want to aim higher.

I think you're looking for the Core MIDI framework. The Apple documentation has more information.

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