[Dan Ebberts]

The JavaScript engine won’t accept if/else on a single line in that format. I’d do it like this:

a = comp("precomp").layer("title").active ? b : c;

[Dan Ebberts]

Ah, OK. I assumed you needed to be able to animate the checkbox to indicate when to duck the background level, but apparently you just need a static value. Glad you got it sorted!

[Dan Ebberts]

Possibly. Sorry I wasn’t able to provide the info you’re looking for. I wasn’t able to observe any issues with those characters.

[Dan Ebberts]

No carriage returns, many carriage returns, with .split(“\r”) it all comes out as expected…

[Dan Ebberts]

If I paste that into a text layer and do .split(” “), I get 35 little strings, as I would expect.

[Dan Ebberts]

I’m not seeing any issues caused by any of the characters you listed while using .split(“\r”).

[Dan Ebberts]

Which special characters are you referring to?

[Dan Ebberts]

For each property that has sub properties, you can use numPrperties to loop through those. I think what you’ll need is a recursive function that call you whenever you encounter a property that has sub properties (PropertyType.INDEXED_GROUP or PropteryType.NAMED_GROUP) and that should let you traverse through the entire hierarchy.

[Dan Ebberts]

In the simplest form, it could look something like this (you’ll have to edit it to point to the actual location of the checkbox). Hopefully it will work for you, or at least give you some ideas:

cb = effect("Checkbox Control")("Checkbox");
fadeFrames = 20;
cbOn = -50;
cbOff = -12;
fadeTime = framesToTime(fadeFrames);
v = cb.value ? cbOff : cbOn;;
if (cb.numKeys > 0){
  n = cb.nearestKey(time).index;
  if (time < cb.key(n).time) n--;
  if (n > 0){
    t = time - cb.key(n).time;
    if (cb.key(n).value){
      v = linear(t,0,fadeTime,cbOff, cbOn);
    }else{
      v = linear(t,0,fadeTime,cbOn, cbOff);
    }
  }
}
[v,v]

[Dan Ebberts]

Also, couldn’t the background expression just monitor the checkbox instead of the voice over audio level? It’s much easier to detect changes in keyframes than value levels.