Debian 10 Sound(Realtek High definition Audio)

[Data007]

I write this in windows and have a screenshot of the machine specs, As you will see it is dual display. when trying to configure(kde) the sound comes out of one of the display's, it should preferably come out of the onboard Realtek High Definition Audio->optical audio out, through to 7.1 amplified. Iam able also to get audio out of the front audio out(headphones & mic)

How to get audio out of the onboard "Realtek High Definition Audio" device?

well that's annoying, it says "the board attachment quota has been reached" well its a desktop gaming machine and works well in win10.

Onboard motherboard ="Asustek computer INC. STRIX B250F Gaming(LGA1151)

Have been along the Debian wiki and will post the output of the command in Linux.
Back shortly
XX Edit
PCI ID Works? Vendor Device Driver Kernel
8086591f
80861901 Intel Corporation Sky Lake PCIe Controller (x16)
8086a2af
8086a2ba
80862822 Yes Intel Corporation SATA Controller [RAID mode] ahci v2.6.25-
8086a2eb
8086a294
8086a298
8086a299
8086a29a
8086a2c8
8086a2a1
8086a2f0
8086a2a3
808615b8 Intel Corporation Ethernet Connection (2) I219-V
10de1b81
10de10f0
144da804
1b211080 ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge
13f68788 Yes C-Media Electronics Inc CMI8788 [Oxygen HD Audio] snd-oxygen,snd-virtuoso
1b211242
/XXEdit

[phenest]

Can't you select the sound device to use? I don't use KDE but I can do this in Gnome.

[Data007]

Can't you select the sound device to use? I don't use KDE but I can do this in Gnome.

Iam relatively new to Linux however I have been in visually to the sound settings(kde) and run through the options. The only device I can select(that works) is the second display.
Possibly the MBoard(which I have and use for audio) is to new. I have been along the boards website and it has Zero drivers for Linux.
Previously all the other machines I have used, have had no problems whats so ever in configuring both Graphics/sound in Linux.

[phenest]

Install the Realtek firmware?

[Data007]

Install the Realtek firmware?

apt install firmware-realtek ??

I am starting again from fresh I tried to install again and the installation would only go so far failing
to install software, failing to install Grub, Error detect mirror/or configuring same. One thing about the installer(Debian)
your offered the opportunity to skip the step and try another one, this is a waste of time as once failed it's like
a never ending loop of try's