hi! i have an ipad 2, camera connection kit, and audio technica at2020 usb microphone setup. i am planning to get a 37-key korg microkey keyboard. i read somewhere that plugging this keyboard to ipad using the CCK won't work so i need a usb hub. my question is do i need a powered or unpowered usb hub to connect the microphone and keyboard to the ipad simultaneously? also what usb hub can you suggest? any suggestions to make this kind of set up work will be appreciated. if this keyboard wont work, any suggestions on alternative 37-key midi controller will help. i am looking for a very portable one. i didnt buy a keyboard yet. thanks!