Yes, of course she is using styles...controlled and changed by the registrations buttons. 16 are available. The Electones play Yamaha style files. Also you can setup your own sequences to change the registrations as you play...or you can use a knee bar or one of two switched mounted on sides the expression pedals, or just push the button.
There is some autoaccompanyment...but she is doing most of the playing.

I had next to the highest model Electone in 1987...most of these things were there then...this baby is designed for live play.

I sold mine because the MIDI implementation at that time was weak, AWM1 and FM were the sounds, and they were good but better was available, I wanted to add external tone generators and it just wasn't designed for it, and I kind of lost interst as I was looking for a new wife :-).

The thing is this is 2 manuals, pedals and all setup ready to go (If you don't want to play peadals it will do it for you just like an arranger) But the pedals are great for big bass, timpanys, and other percussion.

Sequence disks with music books are available, and they can play the whole song (just NIDI) , but watching her I think she is using sequenced styles and changes.

So, this is 2010, that came out in 2004..it would be very difficult for anyone to replicate that performance on any arranger with one 61 note keyboard. IMHO...I could be wrong, it happens a lot :-)

I have been pretty excited by it..as I had lost contact with the Electones since about 1990....Probably the only way I will get one is:
Get a divorce, move to Japan, seek out Stagea female owners, find a hot one, marry her and then...I can play the Stagea.

Lee S.