Phase..

" The other thing that is very important is the phase. When I am dealing with digital audio which I can move around, I always make sure that the kick and the snare and rest of the drums and the sample are perfectly in phase.
...
As I said, I’m really into phase, and one of the main issues was to make sure that the kicks No ID added [the tracks ‘MstrK’ and ‘MstrS’ in the screens] were exactly in phase with Kanye’s drum loop [‘Dru1’]. Kanye had taken a sample from a live drummer and rearranged and looped it, and obviously the feel of a live drummer was not the same as that of programmed drums.”

from: http://www.soundonsound.com/sos/dec09/articles/it_1209.htm

i can understand paying attention to phase if your working with different versions of the same sound... but what is this about?

as far as i know if ure layering 2 different kicks u can still have phase cancellation problems as they contain more or less the same the same frequencies i could b wrong but to make sure i checked out a few other sites on phase issues when layering drums feel free to check them out if u want more info

dr4track wrote:as far as i know if ure layering 2 different kicks u can still have phase cancellation problems as they contain more or less the same the same frequencies

right, i think i get it!