If anyone is limited by 1 midi device on Windows, you can try using a virtual midi port application LoopBe1 - A Free Virtual MIDI Driver or midi ox found here http://www.midiox.com/…
You should be able to install this and choose it as an output from a channel in Ableton or any DAW. Its like a virtual midi cable that happens inside the computer. Then access that in your blueprint, just like you would a real physical midi interface… I wanted to chime in with this because I’m after the same result and am still trying to figure out how to find my MIDI device. I’m sending from my Mac to my PC so I’m not using a virtual cable but am just a NOOB to Unreal… Cant wait to get it working though. Thanks for the screen shot, gonna try what you’ve done there.