I just finished recording a band that sounds alright, but the vocalist is just... hard to deal with in a mix. His voice is almost atonal. lol. He has a lot of low end in his voice, which is why I opted for the sm57 over the at4040. I tracked a single take down the middle, and an identical take each down the left and right, maybe hoping it would help out making it sound more musical... well, it didn't. I am going to get a rough mix and post it up, but wondered if they're any tips off the bat that you guys use to process stubborn vocals.