[Dan Ebberts]

Try this:

triggerVal = 39;
a = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider");
t = 0;
f = 0;
while (f <= timeToFrames(time)){
  if (a.valueAtTime(framesToTime(f)) >= triggerVal){
    t = time - framesToTime(f);
    if (t <= 30) break;
    f += timeToFrames(30);
  }
  f++;
}
t > 30 ? 0 : linear(t,0,30,0,100)

[Dan Ebberts]

I think it’s most likely that your entered text is not quite exactly the same as the pick-whipped version. That can easily happen if you copy and paste text, where you can pick up curly quotes instead of straight quotes or an en dash instead of a hyphen (minus sign). It’s a different story, of course, if you’re typing directly into the expression text field, but it would still help to see an example of what’s happening.

[Dan Ebberts]

Can you post an example screen shot that shows the expression and the error message?

[Dan Ebberts]

I think it might just be a time remapping expression like this for the rush layer:

L = comp("MASTER").layer(thisComp.name);
linear(time,L.inPoint,L.outPoint,0,L.outPoint-L.inPoint);

[Dan Ebberts]

Like this maybe:

triggerVal = 39;
a = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider");
t = 0;
for (f = 0; f <= timeToFrames(time); f++){
  if (a.valueAtTime(framesToTime(f)) >= triggerVal){
    t = time - framesToTime(f);
    break;
  }
}
linear(t,0,30,0,100)

[Dan Ebberts]

Maybe like this:

c = thisComp.layer("Shape Layer 1").content("Rectangle 1").content("Fill 1").color;
hsl = rgbToHsl(c);
newL = Math.min(hsl[2]*1.1,1);
hslToRgb([hsl[0],hsl[1],newL,hsl[3]])

[Dan Ebberts]

This should be close:

menu = effect("Dropdown Menu Control")("Menu");
transitionDuration = framesToTime(10);
positions = [[960, 800],[150, 150],[1340, 700]];
val = positions[menu.value - 1];
if (menu.numKeys > 0){
  n = menu.nearestKey(time).index;
  if (time < menu.key(n).time) n--;
  if (n > 1){
    t1 = menu.key(n).time;
    t2 = t1 + transitionDuration;
    v1 = positions[menu.key(n-1).value - 1];
    v2 = positions[menu.key(n).value - 1];
    val = ease(time,t1,t2,v1,v2);
  }
}
val

[Dan Ebberts]

I think if you provide more details on how you want it to work, you might get more action. If you could answer questions like when exactly does the animation take place, and what happens before the first keyframe, that would be helpful.

[Dan Ebberts]

Try changing this line:

var blinking = Math.abs(Math.sin(time * cursorSpeed));

to this:

var blinking = Math.abs(Math.sin((time-anyTime) * cursorSpeed));

[Dan Ebberts]

Starting simple, this will ramp up the amplitude of the wiggle over the duration defined by tRamp:

freq = 5;
amp = 200;
tStart = 0;
tRamp = 5;
a = linear(time,tStart,tStart+tRamp,0,amp);
wiggle(freq,a)