Thanks again for your assistance Dakyris. Now that I have the headset and sound card working together I have another question. My BeyerDynamic MMX 300 are rated at 32ohms. I was wondering if that is where I leave the setting at in the Asus Xonar Audio Center. I thought this high end headset would be rated for higher performance. I am running it in the "normal" setting of 64 ohms and below. I don't understand electrical stuff so this might be the right setting or not. Anyone that has the answer please let me know. I tried the 64 to 300 ohm setting for just a brief test and it was quite a bit louder. I don't want to fry my headset. It just sounds a bit weak in the normal setting. I might have to adjust it elsewhere. Thanks again for all the assistance and encouragement. Very grateful to be gaming again with full coms in operation.