By default, the speakers selected (7.1 Surround sound), the sound goes, everything seems to be fine, BUT when I want to turn up or down the volume, the sound does not respond at all from the word at all, but it begins to respond when I start to turn down the sound on other speakers that are not selected as the playback location, there is no sound, I searched on the Internet, There's nothing, they throw up their hands in support, and my poking doesn't help either." 

In the prog, everything is in its place, the sound is surround . that is, the sound comes from speaker 7.1 a is configured by setting up another speaker. sometimes the sound disappears completely and returns at random. 

razer barracuda x headphones