I have a GTX 670 connected by HDMI to my Asus ML228 monitor. I am aware most GPU come with digital sound and want to use this to utilize a set of headphones for FSX multiplayer. The monitor only has a single line out for sound. Is there an adapter I can use to get a line in and line out for the GPU sound? Im open to any other suggestions. What I am trying to do is seperate voice communication fom regular in game sounds and a second sound card is needed so I thought why not use the GPU sound. Can this be done. If not should I just get a second sound card and if so will a USB one work or should I get a regular PCI one. Open to any and all ideas. Thanks