I am trying to setup NUC5i5RYH as my home theater PC running Windows 7 64 bit. The speaker test runs just fine and I can hear all 7 speakers and subwoofer. However no matter what I play my Pioneer VSX-90 receiver identifies source as stereo and does not produce real surround sound. I know that the sources have audio encoded in DTS or Dolby DTS or Dolby HD 7.1 and 5.1
I have installed the latest BIOS and all the drivers but it does not help. I thought it's the receiver problem and connected another PC which has Realtek audio chip as well. All worked fine.
Please help me identify problem with NUC.