Howard,

This may not be elegant but it could do the trick:

Presets.

You can save, not only EQ modes, but different settings of the variable EQ mode. Note, you have to set up different presets for each input. The presets can be volume independent but are source dependent (i.e., you need three presets per input for the three EQ modes).

This gives you extremely detailed control of your system parameters. However, you need to duplicate all settings you want to stay consistent from preset to preset on the same input.

You'll have to be creative on naming the presets since you will end up with quite a few. (I think there are 40 preset memories for zone 1 alone!)

All this by just making IR macros to retrieve the desired presets. No RF or 232 interface needed.

rob