I was using the Apple Camera Adapter at first and it worked fine for me. This adapter reverses the iPad USB port from device to host.
But, in my case, this setup caused me a problem as I want to use my iPad in an Alesis IO Dock II and the Alesis Dock makes the iPad into a device and not a host and there is no way to use the Camera Adapter simultaniously.
So, I got a Bluetooth dongle (CSR 4.0) to pluged it into the Mod Duo USB Host connector and now I can keep my iPad in the Dock, use USB MIDI and still be able to configure the Mod Duo via Bluetooth and the Safari browser.
My only remaining problem now is that the iPad browsers (Safari, Chrome, Opera or Firefox) do not display scroll bars thus preventing me to select options other than those displayed. I cannot scroll through pedalboards either.
Any of you has this issue with an iPad ?