BTW, one feature I've yet to see on arrangers that would be way cool is, if you pick say a piano to play, the arranger automatically mutes the style piano Part. Ditto for horns, organs, whatever.

Generally, YOU play it, you don't need the arranger playing it too! But you never know what sound you feel like using, if you are just improvising, so you can't set the arranger's Part Mute up for it. Different sounds need different tracks muted.

An automatic parameter to do this would be awesome!