I have my computer connected to a harmon kardon reciever using the cd input. I can only get good volume when I push my computer volume to the max and push the volume on the receiver. When I look to get more significant volume, the speakers start with this feedback. I realize that this is not a speaker issue, but was wondering if anyone has some advise.

FYI - when I play a CD, (connected via the DVD input) everything works perfectly.

Thanks in advance.