Sound diver stuff is for your computer to controll your XP30 through MIDI, or your record your songs via MIDI from the XP30 to your computer, not audio recording. Since you said that your XP30 headphone jack output is good, you can also use the headphone jack of XP30 to debug your problem - buy a 1/4" stereo to 1/8" stero cable and connect it between your XP30's headphone jack and line input jack of your sound card, make sure that your XP30's master volume is not too high, adjust it further as necessary. I wonder if you digitized any other stuff before, however, everyone has his/her first few times to learn as he/she goes.
Paul Ip
from Texas