so if you are new to Arduino I suggest you avoid it and use a raspberry pi.
Maybe this cheap board would do for your project:-http://www.hobbytronics.co.uk/usb-host-midi
Some Complex MIDI devices use a built-in USB Hub. These MIDI devices are not supported and will NOT work with our USB Host Boards. You can determine if your device has a built-in hub by running the free Windows program USB Tree Viewer. If, when you plug in your MIDI device it appears as a new Hub plus one or more devices then it will not work.
Having done a lot of work with both the Arduino and Raspberry Pi with MIDI, I would avoid the Pi if you are a beginner, it is a lot more difficult to work with than the Arduino.
Did you read the second quote in my previous reply? It won't work with complex MIDI devices like yours.