I resolved the issue with installation of a usb external sound card. The sound is crisp and perfect and I have real 7.1 dts support through optical spidf and hdmi cables.
I have a problem with crackling and popping sounds when playing files on optical  and through HDMI to my AV amplifier. This does not happen when I use my BT connection, but I cannot use my amplifier with BT. I tried uninstalling drivers and reinstalling but does not solve the problem. I am still on Windows 10. Tried changing settings in AWCC sound tab and I could not solve the problem. I have installed the latest Realtek drivers. I even tried 2 previous versions if the driver. It is driving me mad. I don't recall having the problem when I got the pc. It happened the last 6 months if I recall correctly.
Aurora R11, crackling sound using optical or HDMI, no problem on BT