Currently, it will require 28 buttons. Also, you will not be able to "drag" your finger across the screen to increase the level. You will need to press and release. I toyed with this idea on my 9600 with my Denon 5803. However, I shied away from it as I would not want to accidentally press the "10db" button when current volume level is -40db and blow out my speakers or my amp.