I haven't used midi much in the last few years (mostly cv/gate with analog modular stuff), and definitely haven't used it with logic. until 3 nights ago, when I played on my keyboard, the midi would register in the input, and go through to the output. No problems. this is, as I recall, what they call 'midi thru' in logic parlance. then it stopped working. midi in works. midi out works (recorded tracks play back). When I load up ableton, the midi in gets sent immediately to whatever output I set up. In logic the instrument selected for the 'no midi thru' is 'no output' so that doesn't seem to be it. I created an empty project and I have the same problem. What am I missing or forgetting, and what would cause this to suddenly stop working?