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OK, I'm a new a guy, I might ask some silly questions.. Up until just recently I always ran my home stereo speakers, (2 channel) out through my PC. Of course they were powered by my home stereo amp. The setup was such that the speaks. were wired to the amp, and the amp had a lt/rt out going into my soundcard on the computer. The soundcard was great because it was RCA inputs, and married up well to the RCA's coming from the amp. Fast forward to today.. I have a new computer. It seems that people don't use soundcards much anymore? So they tell me to run the audio through the motherboard. The MB is a ASUS P9X79. It has on the back... "Line-in" center channel, side speaker, front channel, etc. There is no "Line-out" On the front of the tower there is a mini jack for headphones, and a mini "Mic" jack. I have purchased an adaptor for the RCA outs coming from the amp, to adapt. into a single 3.5 mini jack to go to the MB. I am completely stumped on where to plug this in. I have gone with the "Line-in" and all the other options on the motherboard. No sound cometh forth. I've gone with the front of the computer, the Headphone out jack, Mic jack, etc. No dice! When I plug it into different places, a window will pop up from the MB and show where I've plugged the amp into... but still no audio. (When I touch the hot end of the output from the amp, it will make noise in the speaks, obviously they are working. But no signal is seen from disk drive, youtube videos, etc. Is there anything obvious that I'm doing wrong here? Do you need more information? The pop up window for audio via the motherboard is the most involved thing I've ever seen. There are a million options. I don't care about all the 7.1, I just want the good old left and right channel playback. Thanks in advance!