Linking opacity to audio?

[katen54345207]

So I'm wanting to animate a robot character whose mouth glows at varying intensities correlated to how loud his voice is. 

The character is the robot in this animation, which was created in After Effects:

Introducing: A Kiss Goodnight with Ephram - YouTube

I'm wondering if Character Animator happens to have a similar feature, or if I would just need to settle with a different method.

Thanks!

[alank99101739 · Accepted solution]

The “Layer Picker” behavior has an “Audio Level” setting. I have never tried it, but might be worth experimenting with. The layer picker allows you to have multiple layers which switch in - so you would draw different levels of brightness For the different layers.

[KJerryK]

As Alan said, the layer picker is one way == here is an example I did a couple weeks ago along with the rigging. The layer picker behavior is at the bg group level.

             

Edit: I made a better example