This Fri my buddy is having his band lay down some tracks and he wants me behind the mixer. He's going to do individual tracks before I get there, and I'm going to operate the mixer while they play as a band. This will be my first time mixing/recording drums. What advice can you give me to me for what to expect and/or do? EDIT: Actually it's my first time recording more than one source at a time, so there's some learning there I need to do as well.