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After Effects Opacity Reacting to Bass Audio

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Mario Pascal
After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 4:34:39 pm

Well i've started a music channel on YouTube where i make videos about.. well basically its an audio spectrum reacting to music. But i would like to add a flashing light effects where the flashing only happens when a bass sound is played. All i need is an expression for that to happen, I know how to do the rest. If you could even make a tutorial on youtube and link me to it that would be even better but if I get the expression I'm sure i'll be able to do the rest


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Dan Ebberts
Re: After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 5:11:38 pm

The trickiest bit might be isolating the bass, for which I would recommend Sound Keys from Red Giant. Or, if you already have that solved, this might help:

http://motionscript.com/design-guide/audio-trigger.html


Dan



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Mario Pascal
Re: After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 5:50:47 pm

I have already isolated the bass using Sound Keys, but I want to make the opacity react to it. I tried the expression but it keeps showing "After Effects warning: Class 'Number' has no property or method name '0'
Expression disabled.

Error occurred at line 7.
Comp: 'Audio Spectrum'
Layer: 10 ('White Solid 2')
Property: 'Opacity'

Here's an example of what i want..






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Dan Ebberts
Re: After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 5:55:05 pm

The expression needs to be modified for whatever property you want to control with it. As written, it will create a wobble when applied to the Scale property.

Dan



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Mario Pascal
Re: After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 5:58:49 pm

Oh.. Well i'm not no expert at this stuff.. so I wouldn't know how to do this.. If you could show me that would be great if you don't mind. But it's ok if you can't thanks anyway!


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Dan Ebberts
Re: After Effects Opacity Reacting to Bass Audio
on Dec 22, 2016 at 6:11:47 pm

If you were doing it with keyframes, how would you do it?

Dan



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