I feel like I'm probably missing something really obvious, but I can't figure it out, and neither Ziqal, nor the store I bought it from have responded in the couple of days (I know it's not that long, but I want to use this fully!) since it arrived, so I thought I'd ask here.

From what the manual says, it looks like the aux option in config should have 4 settings, stereo, dual, midi utility and lfo. When I have midi on, I only get stereo or midi util. When I have midi off, I only get stereo or lfo.

It's updated to the latest firmware (though it took a lot of tries, it also failed to read the SD card at one point as well as taking literal minutes to load wavetables, so I'm worried I got a lemon, another reason I want to get this resolved asap) and I've tried both the original SD card and a sandisk 16gb with the same results.