Yeah man it's sick. I've used it for years. As long as the thing you're extracting from is somewhere in the realm of what you programmed it can do amazing things.
Like you could have drum chops on a rigged 1/16th grid with the only "swing" being that you maybe did hats on 1,3,7,11...etc. for a bit of syncopation. Then you grab a Bernard Purdie break, hit extract groove. then apply groove and bam, your 1/16 rigid loop is swinging lovely.
You can use other stuff besides drum breaks too, really anything with that humanized feel to it, mostly stuff that was played live. But it could be programmed stuff to extract to so long as it had some swing.
I've found myself using it just certain tracks or on whole songs, it can work both ways.
Reason has a dedicated mixer for the grooves and where you apply them with faders for the strength applied. They include a folder of all the values from the MPC60, and some more extreme genre ones.
In a couple hours you could make a library of hundreds of them of anything you want to extract.
Which I might do today if it starts raining again.
