It is important to know that the Shure SM7B is very gain hungry. Often the gain of a conventional interface is not enough. So if you turn up the gain control on the interface, it starts to hiss. What can help is e.g. Cloudlifter CL1 or (cheaper) a FetHead Vib Tritonaudio. Unfortunately, you can't buy these at digitec. Important: These "gain boosters" can only be used if the interface is 48V phantom powering capable.