Hi!
I need some help with my logitech 5.1 channel speaker setup. I recently went out and brought a usb sound card as my laptop only has an input for headphones, or just left and right speakers, (the green plug). But my speakers have 2 other plugs, one for the center and sub (not to sure about that) and this plug is orange, and then the rear speakers which have a black plug. The usb sound card has 3 plugs also, a green, orange, and light blue one. I plugged it all in right, green to green, orange to orange, but then thers black to blue? So i tried an audio track that produces sound through each speaker at a time. Front 3 work great, but the sound thats meant to come out the rear speakers just comes out the front left and right. The usb sound card is quite old and didn't come with any software, I just plugged it in and 7 recognized it imediatley and used it as the default output for sound.

Any ideas?
thanks for any help!