Maj, another option for bypassing the noisy internal computer electronics and taking the clean digital output from the USB port is to use a device such as the Xitel MP3 Streamer (about $40),formerly called the HiFi Link. It converts the output to analog and feeds it into unused inputs on the receiver. I've used the HiFi Link for several years with good results to listen to streaming internet music stations.

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Enjoy the music, not the equipment.