Nine Inch Nails
The begoming (into riff)

I couldn't find any tabs of this synth part in the intro, 
so here is my interpretaion of it.

e---------------------------------------------------------
b---------------------------------------------------------
g---------------------------------------------------------
d---------------------------------------------------------
a--------------------------4--------------------3-3-3-3---
E--3-3-3-3--4-3-1--3-1-4-1---1--3-3-3-3--4-3-1--1-1-1-1---