How can i create sound module for my roland E-68 intelligent keyboard Midi Synt

I have roland E-68 intelligent keyboard Midi Synthesizer. I want to create sound module to expansion my roland E-68 with the Arduino UNO R3. I had been using a computer with a sound card creative sound blaster. I connect my roland from midi out to midi series in creative sound blaster. so I can retrieve data from a computer via a sampler sound blaster sound card. how can I apply this to ARDUINO instead of a computer?