I think the "important point" John Smies makes here is that the "keyboard touch sensitivity feature" used to trigger the relative volume of the auto arranger parts, apparently appeared on earlier arranger keyboards but is no longer included in the current line of arranger keyboards. I haven't heard of this feature before but it sure seems like a valuable feature to have for enhancing the "expression" of the accompaniment. I too wonder "why" this seemingly useful feature has been elimated in current arranger keyboard models.

Scott