here's how I make dubstep growls: grab a pitch channel, get yourself a fm (6-op), set the first freq wave to a low pulse width, play around with the volumes n' EQ, then go to da mod channel w/ pressing Q and add a modulator for ur pitch's EQ filter morph and set it to 0 and 1 randomly, then go to ur pitch and click that + near the EQ and go to 1, after that you play around ig.. (also add bit-crush, and distortion).