Hi, I'm trying to rip my cassettes to digital using Audacity. I'm not using my proper tape deck, but instead a cheaper stereo (an Aiwa). The cassette deck works just fine and music comes out of the speakers. When I connect headphones music also works. But when I try to plug it into my computer and record the output with Audacity, all I get is a loud electric hum and nothing else. Anyone know a solution?