so i have a saffire 6 usb and a sennheiser mk4 mic. Im fully satisfied with it, but Im frustrated. My first song i recorded on it sounds so much more quality and my latter songs havent been quality. What do i need to do to make sure i get a quality recording. just small tiops would help? Where should the gain be, should the inst button be down? etc? any help would be greatly appreciated. I can also post the songs to show the dif in quality