quick expressions question, audio + scale on layer

[Mike Clasby]

It should work.

Are you pickwhipping to a Stopwatch?

Alt Click the Scale Stopwatch for the layer(s) you want to scale with the music, then pickwhip that to the Slider (“E” on the Audio Amplitutde Layer reveals the Left Channel, Right Channel, Both Channels, Twirl Down one of those to expose the Slider, you need to pickwhip to the stopwatch).

This starts at 100% for the layer(s) and adds scales up with the music:

temp = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
value + [temp, temp]*20

The *20 is just to multiply the audio temp values as they are small. Adjust to get the size increase you want.

This just uses the music temp values so the layer is the size of the temp values (again with the *20 so we can see it better).

temp = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
[temp, temp]*20

[Duncan]

Brilliant, thanks, brain was dead at 17:30 last night, this works a treat. Cheeeeerrs

[Duncan]

can this be applied to affect only the height of my layers?

[Mike Clasby]

I’m assuming you used this expression:

temp = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
value + [temp, temp]*20

Modify the last line to:

value + [[0], temp]*20

If you wanted to just expand horizontally it would be:

value + [ temp,[1]]*20

Note: if you want it to only expand up, not both up and down, move the layers anchor point to the bottom of the layer(Pan Behind Tool (Y) is easiest).