I'm just trying to understand in general, what studio "tricks" are used often in a professional studio after recording vocals. For example, suppose I have a great singer, but sometimes there's a tiny note that might be a hair flat, or maybe there might be a harsh sounding note from an incorrect placement of the soft palate when singing. Basically, how do studio professionals make a really good singer, sound great? And how does a really poor singer sound good in recordings? We all know that some musicians are incredible on their CDs, but in live performances just can't sing. And some other performers, for example, Sara Bareilles sound great live, but in the studio sound flawless. What are some techniques used for vocals in the studio after recording?