5.1 surround sound audio through splitter?
So I have these Turtle beach 7.1 surround sound headphones that uses an optical cable to connect. I wanted to use these with my laptop. So doing some research, I bought myself an HDMI splitter. I connect my laptop to this splitter via hdmi. The splitter splits the input into an hdmi stream, and a toslink stream for audio. I connect the hdmi link to my Tv and the toslink optical to my turtle beach:
Laptop ---(hdmi)----> Splitter -----(hdmi)-----> TV
Splitter-------(spdif) -----> 7.1 surround sound stream headphones
However, my problem is that the headphones only output stereo, and looking at my playback devices menu, I get no options for any kind of surround sound stream. The only options are the original laptop speakers and the TV stereo. It would appear that since my TV only has a 2 channel stream for audio, 7.1 is disabled.
Any Ideas on how I can go about getting surround sound with this setup?