With the purchase of my laptop I was offered a upgrade to a Soundblaster X-fi for my laptop for 20$. I have a 5.1 surround sound set up in my basement and when I plug in my laptop (with the soundblaster card) with an HDMI cord to the receiver, all the music I play on youtube only goes through the 2 main speakers I have.
Is this because the music I play has to support the surround sound? What is the purpose or add of this card? To improve sound quality? Or just for that extra equalizer stuff?