@Boytec: looks a lot like iRig MIDI 2. But that one uses a normal usb port (and not a micro like the OP-1). So i don’t know if an IRig MIDI 2 will work with the OP-1 (with another cable, because the ones that come with it is not the one you need).
Cant you just use a simple usb to micro adapter in the op-1 case?
Maybe that is possible. I hope to hear from others what works well! So i can use the same setup. P.s. I don’t own a irig midi 2.