How can I connect analog 5.1 speaker system (Monoprice Select 13773) to my laptop (XPS 13, the 2015 model) WITHOUT tv or receiver? There are similar questions and answers suggesting this or that connector, but none of them are definitive or clear. I prefer to buy a connector that costs less than 50 bucks and deal with it. And yes, naturally, I want to get true 5.1, not parallel channels in different speakers I have been checking around the net for a while and I really do need guidance. Thanks!