Reply to Name this Effect !!!!!

Im looking for an effect in traktor which i know is used by a few Dj's i just can't seem to find it and was wondering if someone could help me out this effect was used in the making of this song but is also used in Traktor the effect in question is at 0:50 - 0:54 and also 6:41 - 6:45

Thnx in advance