Astro a40 no 7.1

[fedupwivthis]

Hey guys,
I just bought a pair of Astro A40s and I have been trying to get 7.1 to work. I have them plugged in to my Asus xonar DGX through optical connection and through the mixamp pro. However, I cannot change the sound output to more than 2 channels in the sound setting and therefore cannot get the 7.1 surround, as it requires you to set your sound card up to 5.1, which my card can do. In the xonar control pannel, I have no option for Dolby Digital, but just PCM.
Any thoughts?
Thanks in advance

 

[Guest]

well they are headphones. they have 2 speakers so 2 channels. thats what they call "stereo". thats the best it gets. using virtual surround is a great option though.

 

[fedupwivthis]

The Astro A40s used with the mixamp should generate 7.1 surround, using a 5.1 sound card. The fact is that my sound card will not change to 5.1 from 2 channels.

 

[Guest]

you cant get true surround sound out of 2 speakers is what im trying to say. even if you could change it to 7.1 surround its not like it would be actual 7.1 surround.

 

[fedupwivthis]

Yeah, I think the problem is that the Xonar DGX cannot encode Dolby Digital in realtime. I may have to upgrade

 

[Guest]

well im not exactly sure what youre going for. what would you upgrade to? im curious