another quick question: 
How do i record changes on the mixer? For example i press record, then play, then for one of the tracks i can mess around with the device its attached to and it'll record those changes. But what if i want to change the volume of the track on the mixer at a certain point? or even the master volume? 
Also, is there a way to increase the volume without having it peak out? keep it in the green/yellow area yet have it be loud?  
thanks.