Hello
I used to have a KN1000 and although the book said something to the effect that by stiking the keys harder in the left hand that some changes would occur in the accompaniment making it more like peforming in a live band. But, I'll have to admit, I never heard any change, even though I tried it on a number of occasions. But yes, the way they described the way it should work would be an excellent idea. I know some keyboards the backround will change according to the chords one is playing. I don't know if the 7000 does that because I have never seen one.
Best
Scott Langholff