I have been messing with this for a few days now and I am trying to
hook up a control box that is on our Judge's bench to our dm1624. All
other controls are working (ex. Sidebar, toggle mute, etc.) the only
thing I can not get working is the actual volume. I hook it up and if
I turn the switch to off, ccw, then it will shut off, other than that
it will not raise nor lower the volume. Any thoughts or help would be
greatly appreciated.

Thanks
-Brian