My application is a simple array of buttons that send out CC messages to enable or disable MIDI devices. I have two sets of "on" and "off" buttons that work just fine individually. I want to create a third "panic" button that encompasses both of the "off" buttons to add an "all off" functionality. I thought I could create a supercontrol that drives both of the "off" buttons but I've spent a few hours on it and can't seem to get it work. I suppose an alternate way to achieve the effect is to create a button that sends the "off" CC on 2 different MIDI channels, but I'm not sure how I could do that, either.
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