Hey guys. I've just brought some Creative 5.1 X-540 speakers. my problem is my MacBook Pro only has one input for the audio where as the cable that comes with the speakers has 3 cables, green, orange and black. My MacBook Pro is relatively new, about 3 - 4 months old. It's a 2.8GHz Intel Core 2 Duo with 4GB DDR3 memory. A 512MB nVidea graphics with high definition screen and sound. On the left hand side of my Mac there are two audio inputs, one with the headphone symbol, and another with a strange symbol that has a circle in the middle and what looks like two black squares coming off it from each side, I don't know what that port is used for as none of the 3 cables I plug into it seems to give off sound. What I'd like to know is how do I find out if my MacBook Pro has 5.1 already built in support, as I'd find it quite odd if it didn't given it's specification. Maybe I'm being ignorant, I don't know. So does anyone know a way to find out if my MAC has built in 5.1 or can support 5.1 without the use an external sound card? Finding this out will mean I don't have to spend £30 on a Firewave external 5.1 sound card. Thanks to anyone that can help!