sorry.......what r u talking about......as WAV files......do you mean samples??.....why would you need them as samples if you have them on your synth....by the way....MIDI...is simply the messages exchanged by a devise, IT IS NOT THE SOUND ITSELF!.....maybe you need to plug your synth headphone out into your computer linein. It sounds like your doing MIDI based sequencing.........therefore there is no need to have the instruments in WAV format!!