Sound quality

Sorry DFX Audio in you specs is not souncard. But your mobo has Realtek chip. Try this:
- uninstall all soundcard drivers, DFX Audio software, Asio4all etc etc
- install these Realtek drivers:
https://us.softpedia-secure-download...WHQL_Flex2.zip
- check if you can set required sound quality.

Regarding Bluetooth headphones - no idea.

Here is my Realtek Speakers setup (although I use Xonar soundcard instead); as you can see, using above mentioned drivers it is possible to set both the bit depth & sample frequency.

I will give it a try and get back with the results.

The link above is not permanent, please download from:
Download Realtek HD Audio Driver 6.0.1.7796 Flex2 for Windows 7, Windows 7 64 bit, Windows 8, Windows 8 64 bit, Windows 8.1, Windows 8.1 64 bit, Windows 10 64 bit

Too many possible causes. You can:
- check if you have some sound-related apps installed
- uncheck two checkboxes under Default Format
- set all the options for Realtek chip & output device to Default
- test wired headphones & speakers
- test other output at the rear panel
- find better drivers for your bluetooth...
I cannot solve it without the same hw & sw and without much much more info, sorry.

The screenshot you linked to in your original post showed the sample rate and bit depth of the computer's speakers. If you are trying to change the quality of sound in your Bluetooth headphones, you may need to modify the headphones and not the speakers.

Ben

I used to be able to change the sound quality
...linked screenshot not taken from your system & device, confusing

after installing this version of windows, the option to change the sound quality seems to be greyed out
...previous windows version not specified, w7 requires maybe related a2dp driver

Clicking on the realtek icon doesnt open the program
...bad installation

They are plug and play with windows.
...but driver for dongle exists

...and missing answers: checkboxes, wired devices.

Sorry but that's all from me.