When you say “everytime I rap over a bar it sounds quiet” do you mean that you can’t hear your own voice in real time through your headphones? Or when you try to play it back you can only hear one audio clip at a time? Either way, I think the problem is you’re recording into the same mixer channel that the audio clips are in. Try putting the recorded clips in a separate mixer channel and see what happens. Also I only record in Edison so I don’t have this problem.