Yes Soundcards can be problematic. I purchased an upgrade to my previous Card and could not the Line In for my Ketron SD2 to work. What used to be a simple panel showing all the volumn sliders has now developed into a full mixer with all three Inputs being able to be set to Microphome, Line In or digital. In the end I used the Microphone input socket and reset it to Line In. Still a long way to go - at least another week, I suspect.