How to change timestretch algorithm

I heard Andy talking about 4 different types of algorithms for timestretch, where are they in the software ? On the plug in version, not stand alone

Some of my loops are having artifacts that aren't present when stretched the same way in studio one...
Thanks!

Preferences > Other > Audio Warp Algorithm

found out that mpc audio warp algorythm **** up my loop's tempo. they sound a bit off, like faster or slower. and if i change it to elastique - it's sounds ok. damn :/