I've got a carpc setup using an old laptop which only has a mic in and not a line in. I've turned off the mic boost, but my xm still sounds pretty asstacular. The lower the mic volume is set in the control panel the better it sounds, but then it doesn't go very loud.
Is there something I can buy that will adjust the levels from the line out of the XM so that it'll work better for mic in? I don't want to buy a usb soundcard unless I have to