What do I need to connect my Creative T6200 5.1 speakers to my Macbook Pro 15"?

Question

Hello all,
I have made the best move last year from windows to mac and will never go back.
I have a 15" Macbook Pro, and I used to have a tower computer with a sound card.
My old speakers were pretty good for what I needed - Creative Inspire T6200 5.1.
I was wondering how is the best way if possible to connect them to my macbook so they fuction like a a pair of laptop UBS speakers?
Do I need an adapter to convert the audio imput wires to USB, or somthing else?
Also where can I find one that will deffo work?
The speakers have three audio imput wires; black, orange, green. And a pink connection for the remote control. They used to slot into the back of my tower into the sound card and they worked just fine diddilydo.
The speakers info - http://in.creative.com/products/product.asp?category=4&subcategory=789&product=1 7987
Ive wirtted this out very simply and tried not to keep it techie as Im just after a simple solution.
Cheers
Adam

Answer 1

Mac's  pass through 5.1 through a stereo mini-toslink that also doubles as a analog stereo output.
You use a stereo mini to standard toslink optical cable to a home stereo 5.1 system/reciever that does the 5.1 processing there and outputs to speakers that way.
There is no 5.1 processing on the Mac and it can't use those speakers or power them, those are for PC towers with a sound card that prcesses 5.1 from games etc. and also can drive the seperate speakers sending the appropriate channel down each wire to each speaker.
If you want 5.1 surround sound, whatever software your using will have to pass the combined digital signal out the optical port in recognized formats like Dolby, etc and your matching 5.1 surround sound system will have to be able to decode the 5.1 format and send the signals to each speaker.
So your looking at buying a home theather system now for a few thousand dollars.
Perhaps a Harmon Kardon BDS 770 or something.
https://en.wikipedia.org/wiki/Surround_sound
http://www.crutchfield.com/S-X6j1uWiq0Ml/learn/learningcenter/home/hometheater_s urround_chart.html
Also if you 3D game, which is the main reason people use those sort of speakers, you need to read this.
3D gaming on Mac's, what you need to know