Hi there i have an asus m5a99fx pro r2.0 and an old samsung htx-70 home theater system with 5.1 support. I hooked it up to my PC with an optical audio cable and i cant seem to get 5.1 working. When i go to playback devices then to the output optical and finally supported formats and click on dolby digital it runs a test and everything works but when i play games there is no dolby digital.

• 5.1 Surround Sound Speaker Test
• Dolby Digital 5.1 Surround Sound Test

5.1 Surround Sound Speaker Test

Dolby Digital 5.1 Surround Sound Test

How To Set Default Audio Output To 5.1 Surround Sound In VLC Player. By Fatima Wahab. The good news is that you can force VLC to always play audio in 5.1 surround sound. To set this as a default, you have to go digging a little deeper into VLC’s preferences. Depends on your hardware and drivers. In that case, select Dolby Digital.