Oh, man, I'm glad you cracked this. I spent days getting the Neuma stuff to work and I think I finally got it sorted out, but it was such a bear that I didn't bother sharing it with anybody else.<p>My own use case for this is that my main synth tool is my 2nd gen 12" iPad Pro, but I hate having to deal with the Camera Connector and the irritating fact that it won't recognize my higher wattage USB-C power adapter and USB-C to Lightning cable. So if I want to use it for any length of time I have to use the factory power wart, which actually loses power if I'm running the iPad at full brightness and using a lot of CPU on synthesis. Which makes it really annoying to work on stuff for long periods, and I can't plug in my iRig Pro and a synth unless I'm using a powered USB hub.<p>But this is great. I can just keep the Pi running and hooked up to the synth, even power it off a USB power pack for doing stuff on the go. Thanks for sorting this out!