Timestretch, although that tends to screw with the sound, especially for vocals which tend to be quite delicate.

I've played around on the VariOs sampling and still waiting for a soft version of that type of thing. It is in one word, amazing. You can change the pitch or length without affecting the other. MC-909 has it as well.

___________________
1 out of every 4 people in this country are mentally disturbed. Look at your 3 closest friends. If they seem okay, then you're the one.