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Motion-tracking based stereo pan

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Caleb Trevatt
Motion-tracking based stereo pan
on Dec 5, 2011 at 9:14:25 am

Hey Guys,

Just wondering if there's a way to set-up audio pan based on motion tracking.

For example; if you had a car driving from the left side of the screen to the right with the sound of the car following it.
Is their an expression in AE that could do this?

I'm fairly new to after-effects and creative-cow, so don't hit me if I'm asking something silly.
It's just been bothering me to find out.

-- Caleb

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Angie Taylor
Re: Motion-tracking based stereo pan #AfterEffects #Expressions
on Dec 5, 2011 at 4:13:18 pm

Hi there,

Yes, you can set up and Expression quite easily that will link the Motion Tracking Position (or Anchor Point) property to the Stereo Mixer effect's Left Pan and Right Pan properties. Use the Pickwhip to link the properties together. Then, if you need to adjust the range used you can use the Linear expression to do so.

Here's a tutorial that shows how to use the Linear Expression. Although this one links Time Remapping to the Audio Levels property, it's the same process, just substitute the different properties.

Hope this helps.



Angie Taylor animation & illustration for television, film, web and devices
Twitter: theangietaylor
Linkedin: theangietaylor

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Dave LaRonde
Re: Motion-tracking based stereo pan
on Dec 5, 2011 at 5:00:31 pm

Angie's right about the expressions, but I have to tell you: audio isn't exactly AE's strong suit.

I may be old-fashioned, but I'd prefer to do the work in in an audio application or even a video editing application. They also would have the virture of seeing and hearing the result of your work in real time.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA

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