This is a very simple question that I'd appreciate a solid answer to. I understand that the 'Both' switch allows me to monitor the audio output from both comm radios "1" and "2" at the same time.
What exactly does the 'Auto' switch do? I've read up on what I could find and I get that it basically allows the audio I hear to follow the selected transmitter so that when the 'XMTR' switch is moved from "1" to "2" I then hear audio from "2", but what happens when the 'Auto' switch is turned off?
Which radio do I hear when the 'XMTR' is toggled between radio "1" and "2"?
For clarity, here's a picture of the Audio Control Panel:
[Ignore the three-transmitter unit at the bottom for now please]
The confusion stems from these explanations from this site
First, from the TRANSMITTER SELECTOR SWITCH
The action of selecting a particular transmitter using the transmitter selector switch simultaneously selects the audio amplifier associated with that transmitter to provide speaker audio. For example, if the number one transmitter is selected, the audio amplifier in the number one NAV/ COM is also selected and is used for ALL speaker audio.
That in itself makes sense. So why do we even need an Auto switch?
Now from the COM AUTO AUDIO SELECTOR SWITCH
...[the 'Auto' switch is provide to] automatically match the audio of the appropriate NAV/ COM communications receiver to the transmitter selected by the transmitter selector switch.
...just like it is described under the Transmitter Selection Switch paragraph.
...If automatic audio selection is not desired, the COM AUTO selector switch should be placed in the center (OFF) position.
Well which radio would I hear if the 'Auto' switch is in the OFF position? COMM 1? COMM 2? Neither? The control panel doesn't have switches for me to select the individual audio for COMM 1 vs. COMM 2, does it? If so, where?