thank you for the comments. I used a stereo 1/8th pin>rca end cord and went from spkr out to aux in. the computer is a stock dell and the receiver is a modest Denon. neither is audiophile stuff. my speakers are little Definitive. they lack in low end. all in all I am satisfied with how the computer sounds running through my stereo.
I am sure it isn't optimum, but I hear no hum.