Ken, following up Dan's mention of bypassing the junk in the computer by using the USB output, consider getting one of the USB adapter units. For about four years I've been using a Xitel link from my computer USB output to my(non-USB)receiver to listen to streaming classical stations from all over the world. This or a similar device( TurtleBeach is another)should work with your present headphone amp.

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Enjoy the music, not the equipment.