Cool, okay. So if my mix is shokingly quite when I give it to a mastering engineer (let's say, it peaks at -30 db, just for the example). Now, I bounce out my outs 1-2 and send him the stereo file of my whole mix, which has 30 db of headroom. The mastering engineer can then use any of logic's gain plug-ins to boost that signal up towards 0db. Now my stereo audio file has a dynamic range of 5-7db (like most pop songs according to Steve H in his mastering tut). My question is: Has gaining this signal by such a large amount reduced the audio quailty of my stereo file? Does my recorded singing voice or any of the software instruments have added noise in them? I ask this because I know that "normalizing" also gains an audio file but it actually introduces noise into the signal, therefore it's often discouraged. It seems like gaining a signal with either a fader or plug-in in logic could do the same thing though... maybe not though. Let me know Sifu! Thanks.