I've had an number of PM's about programming the er9X to make the 3 position switch work with the NOVA OSD. Its a pain if you've just upgraded to the er9x and have no idea how to get this going. In any case hope this is of help. Please note that there are a million other ways of doing the mixing for this all of which will work. This is the way I do it and it makes sense when i look at the mixing at a glance which channel is for what.