what is the cost for usb card Update (06/13/2017): also, my surround independent speakers are not usb, is on the side port, is there a kit to enable my using a USB port ?? Update (06/13/2017): my pc is a dell inspiron, lap top, my speakers, ( internal) never has been good, now they have totally quit/no sound, much work have i dodge, researching, settings etc, I m very dissapointed with my $650.00 investment, I believed I did good buying from dell, apparently dell, has slipped in their work's