Thanks for that data; I'm not sure if I can figure out how to convert that chart into a code for the MX-950, but I'll look into it.

The setup in question uses the B speakers to feed audio to a set of speakers outside on the deck, as an alternative to the small speakers built into the LCD screen used out there. The A speakers are part of the 5.1 audio in the main viewing room in the house, and aren't needed when the B speakers are in use, and vice-versa.

I can work around the lack of discrete speaker codes by using the "User1" 2, and 3 settings, which include A speakers or B speakers (or both), but the discrete codes would free up those settings for other uses, and of course would allow for a more elegant macro when switching between the indoor viewing and the outdoor.

The other command, which is a triple toggle between A, B, and A+B, is, of course, not nearly as reliable as the discrete codes.