Question how to setup dolby digital in windows 10

[tigerxr]

I recently brought a 5.1 speaker (real 5.1) , the speaker says its AC-3 and my 5.1 works fine. my pc is asus prebuit with realtek audio console and sonic studio 3 . i use 3mm to aux for speaker connection .i have few questions.
Q 1 on wikipedia it says AC3 is dolby digital so is my speaker dolby digital ?
Q 2 if my speaker is dolby , is it ON by default on windows or i need to setup ?
Q 3 how to setup dolby if its off ?

 

[helpstar]

which speakers are you using exactly
how exactly is it connected to the pc?
only one aux cable?

 

[punkncat]

Do you have an option for optical?

 

[tigerxr]

my speaker are 6 channel(5speaker and 1subwoofer),i am using three 3mm to aux, i don;t have optical input in speakers.

 

[dwd999]

If you open the Control Panel, Sound app, select your speaker as the Playback device, and click the Properties button, what does the Supported Formats dialog box say? Does it indicate Dolby Digital as an Encoded Format? If so, can you select Dolby Digital and click the Test button to run the 5 speaker test, and what is the result?

 

[tigerxr]

If you open the Control Panel, Sound app, select your speaker as the Playback device, and click the Properties button, what does the Supported Formats dialog box say? Does it indicate Dolby Digital as an Encoded Format? If so, can you select Dolby Digital and click the Test button to run the 5 speaker test, and what is the result?

it was off, and only windows sonic for headphones was available. i am able to get my speaker run in 5.1 in realtek and games

 

[dwd999]

You could try running the microsoft_dolby_ac3_installer:

https://www.majorgeeks.com/files/details/microsoft_dolby_ac3_installer.html