I'm sorry, but I tend to look at the world of computer software first to see if a computer based arranger is going to be able to work.

AFAIK, there isn't even a single piece of software out there that can do realtime chord recognition of a wide choice of chord types, with a wide range of tempo selection, and a vast selection of different picking and strumming types. And that is with the benefit of sample streaming, etc., that is easy to do on a computer...

Everything I've tried or read about is limited in it's selection of chords it can recognize. Everything is limited in when you can change those chords (mid-strum, for instance). Everything is limited in how quickly it can load up an entire new set of samples. Not that that matters in the studio, but on a gig?

So, I'm sorry, but if you can't find an arranger technique in software, with vastly more powerful computers and HD I/O capabilities (SA has been around for quite a while with GIGA triggers, etc.), you are not going to find it in a more limited hardware arranger.

At least not in a form that will satisfy the experienced player. One Finger Chord player types, with their vastly smaller chord selection choices, may not notice the limitations. But anyone that knows what a 7b10 is will...

Sorry, but I don't see this as a viable technique for another two or three generation of imbedded arranger CPU's, and we haven't even STARTED to address the complexity and cost of putting these types of libraries together with any decent amount of chord choice. Every single style would need hundreds and hundreds of perfectly recorded loops to be as flexible as a CURRENT arranger like T3 or PA2X, with their sophisticated guitar voicing algorithms.

Those are not cheap to produce, my friends. Current guitar strumming VSTi's run into hundreds of dollars, and that is for only a few chord type choices and not that many different styles.

Ah, well, it was nice to dream, wasn't it?