I've got an interesting question. As far as vocals are concerned, I know there are hundreds of ways to process a vocal track and in alot of R&B and hip-hop songs, I hear background vocals that have to be using some type of harmonizer. I mean the vocals sound good but also it sounds very processed (if you know what I mean). I've heard that alot of engineers use a product called Eventide H3000 to acheive this effect. Is this true? In any vocal track the vocalist is going to have to sound pretty good so I figure engineers probably have the singer sing a three part harmony and use something like the H3000 to make it fatter and add more harmonies. I probably never will own this type of equipment but i've always wanted to know. If you are fimiliar with Teddy Riley, it sounds like he might be using the vocoder function of this product when he is creating his background vocals.