I am attempting to use an Akai MPK249 midi controller with Studio one 5 professional and the Audiobox usb 96 DAI on a Windows 10 system. I have no problems when using other inputs. I have followed all the instructions I can find online for setting up the controller with Studio One, It looks like Studio One is registering sound from the controller, but I cannot hear anything in my headphones (and yes, the volume is up) and when I save the file and playback there is no sound.