1:49. Stems onboard analysis comming soon
yup in the future update
Might not be what you think though. Stems analysis exists in Engine desktop software - but it’s not on the fly, and requires pre-preparing the files. Ditto with Traktor.
I suspect that it may well analyse, but it won’t allow you to load a new track, hit one of the stem buttons and get separation as you play.
(Hat on standby ready to be eaten) 
There will be some caveat, there always is. And with the current stems quality they’re not really worth using anyway.
The fact however that they have released a controller with dedicated stems controls and stems FX shows they are serious about it, or that could just be for Serato / VDJ etc …..
Only time will tell but I don’t think I’ll be buying one right now. Too much uncertainty.