HS1 Surround sound

Hello,

I ve buy the corsair HS1,

I am testing with 7.1 games (Left 4 dead 2)

I ve selected in game 7.1 speakers.

In the corsair application, i ve selected 7.1 source.

Should i select the dolby H icon and the virtual 7.1 shifter? or not?

If my source is in 7.1 i don t have to check this 2 buttons, they are for "emulate" surround sound, when it s not in surround?

I don t understand well how it works!

Thank you ;)