I've got a Fission Turntable (USB) and I can't adjust the input volume so that I can get a decent recording from my vinyl records. It's way too loud and the distortion is extreme. I've tried to adjust the sound via the Apple /System Preferences / Sound icon but it says it has no control inputs for my device. Can anybody help. I'm trying to use Audacity. Am I doing something wrong? Is there another program that will let me use my turntable?