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activating a glow effect with amplitude

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Charles Lawson
activating a glow effect with amplitude
on Sep 1, 2010 at 9:19:37 pm

I am working on my 1st 3d photo montage. One of the effects that I wanted to make happen is to have a glow effect flash when the soundtrack reach a certain amplitude. I have read several posting on this but so far I have had trouble finding one that made sense to my neophyte understanding of AE. Basically when the song reaches it's highest amplitude I want the glow to fire off. So far none of the expressions that I have come up with work. Any help would be greatly appreciated.

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Tudor "Ted" Jelescu
Re: activating a glow effect with amplitude
on Sep 2, 2010 at 9:53:34 am

Trapcode Sound Keys

Tudor "Ted" Jelescu
Senior Compositor/VFX Artist
Bucharest, Romania

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John Cuevas
Re: activating a glow effect with amplitude
on Sep 2, 2010 at 12:58:44 pm

Select your music layer and in the animation tab, choose keyframe assistant "convert audio to keyframes"

Add a glow effect and add this expression to glow intensity:

minMusic = 20//where glow turns off
maxMusic = 24//glow at highest intensity
minGlow = 0
maxGlow = 2
ease(thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider"),minMusic,maxMusic,minGlow,maxGlow)

I have 20 and 24 for where the glow turns off and on, but that's just based on my music sample, you will need to adjust for your music.

Johnny Cuevas, Editor

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