I have two tracks that I'd like to be able to switch back and forth between using a single control (button, MIDI control, etc).
 
I don't want to create separate automation lanes for mute in each track and try to get them aligned as I adjust the change-over points.
 
Ideally, I could use something like MIDI control 64 on its own track to control the mute on two other tracks. When the pedal is pressed, track 1 is muted and track 2 is unmuted. When unpressed, track 2 is muted and track 1 is unmuted.
 
Is there any way to do that?
 
Another way would be to take an automation lane from one track and copy it to another track but inverted. Then I could just work with one track and ensure the other track is the opposite.

I find I can control the mute simultaneously from my control surface by pressing the two track mute buttons. Now I want to record the control surface buttons as mute automation on the tracks.
 
I have the tracks set up with mute automation lanes, the track mute button set to automated mute, automation read and write enable are on. My control surface mute buttons cause the mute to change during Sonar playback, but the action is not recorded. The mute envelopes remain flat line. 
 
I tried using the remote control / learn function on the mute automation envelope. It learns the control surface mute button as control 23.  When I record, the mute envelope does record a momentary spike only while the button is pressed.  It does not toggle the mute state, like the button actually function. It records the momentary pulses, which do momentarily mute the track when subsequently playing back. 
 
How can the actual track mute behavior (toggle) be recorded and automated?
 
 

Switch the mute button to automated mute http://www.cakewalk.com/Documentation?product=SONAR&language=3&help=Automation.12.html#1156718
 
Only need one track automated if a sidechained gate is on the other track

scook
Switch the mute button to automated mute http://www.cakewalk.com/Documentation?product=SONAR&language=3&help=Automation.12.html#1156718
 
Only need one track automated if a sidechained gate is on the other track

I had already got the automation working with the automated mute setting. The problem was the effect of the button on the control surface on the track was to toggle mute, but the recorded data was momentary.  So I push the button for a moment when I want to mute the track, and the track mutes. However the recorded automation is just a momentary mute.
 
Thanks for the tip on side-chain gate. That's a great way to link the tracks.

A general way to do complementary mutes is: 
 
1. Set the mutes for the two tracks to Automated Mute.
2. Mute one track but not the other.
3. Group them.
4. Write-enable automation for both tracks.
 
Now you need to click on only one mute button, and the other one will work in an equal and opposite manner.

timg11
I had already got the automation working with the automated mute setting. The problem was the effect of the button on the control surface on the track was to toggle mute, but the recorded data was momentary.  So I push the button for a moment when I want to mute the track, and the track mutes. However the recorded automation is just a momentary mute.

Assuming you have followed Craig's method...
 
Check that the button on Control Surfaces is:
a) not doing something in addition to "Remote Control...", I mean it is not used in ACT MIDI/other CS plug-in
b) reconfigured to send some Note instead of CC (23, as you have mentioned)
 
CC in "normal" momentary mode trigger value 127 (or some other value on pads) when the button is pressed and value 0 when released. So press/release trigger Mute On / Mute Off. In my tests, Note produce expected result.