Windows will only output sound to 1 device but you can set the video player to output to a different device in its settings. If it's not showing up at all as a sound device then I'd have to wonder what adapter you got. Since it pushes it out, then I'd assume a cheap passive one which may be the issue.
But you are fine with using another cheap gpu.
Thank you, yes im aware of only to one output , if I use an dvi to hdmi adapter, or just an hdmi cable, there is no sound coming from the monitor. I know some programs allow me to use another output device for specific programs or at least something of the sort.
Thanks for answering my question about using a second gpu.