Thanks for the reply. Since I am newbe to JRiver, I really don't know what you mean did I setup the device in MC? Second, nothing I am aware of is using the Kerns as a DAC. With the exception of my PC in Control Panel Sound, I did select the ak100 as the sound card. I was hoping to simply be able to remove the old Soundblaster card all together and just us the Kerns 100. But since MC does not recognize the AK100, it defaults back to the Soundblaster of which is no longer hooked up to my amp. Therefore, no sound when trying to play HD audio in JRiver. I know it is something simple I am missing, just can't figure out what it is. My dealer recommended me to completely uninstall JRiver and re-install it. This did nothing but waste some time. I will check out the audio article on wiki. Does anyone agree with me that JRiver should have a technical support department? I am a certified Microsoft engineer and find applications without good support are pretty useless. This seems odd to me they charge you 50 bux and have no support available.. Are there other applications that can play HD audio? And, have a tech support system? I would like to know and my just switch over and get a refund.