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Growing and decaying audio sine wave

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Klaas Wurtmann
Growing and decaying audio sine wave
on Aug 23, 2016 at 3:32:26 pm

Hi,
I am new here, so please excuse me, if I am reposting anything that has been answered. But I believe this might not be the case, since I didn’t find any concrete answer.

I want to do the following:
Animate sound in form of a sine wave. I accomplished this so far, as I followed the instructions here: https://library.creativecow.net/articles/rabinowitz_aharon/waveform_1/video...

This is all great, but I would like to have a sine wave that is growing in amplitude from the left side and decaying to the right.
It should look as if the points to the sides are static and the wave grows to the middle.
I found this video on youtube:




If you look closely you can see what I mean. That video seems to be just an animation though and not scripted.

Do you guys have an idea how to change the script?

Thanks so much
Klaas

thisComp.layer("audioamplitude").effect("both channels")("slider")*10


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Kalle Kannisto
Re: Growing and decaying audio sine wave
on Aug 24, 2016 at 8:30:17 am

In the wave warp method, use Pinning>Vertical Edges.

Kalleheikki Kannisto
Senior Graphic Designer


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Klaas Wurtmann
Re: Growing and decaying audio sine wave
on Aug 24, 2016 at 8:48:25 am

Hi Kalle,
thanks for the tip. Unfortunately that doesn’t seem to do anything. As I understand it, this method might work with a simple sine wave, but not with the one I create whip chaining the animation to the sound keyframes. Do you have an idea how that is?

Thanks
Klaas


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Klaas Wurtmann
Re: Growing and decaying audio sine wave
on Aug 24, 2016 at 9:35:17 am

I found out what my problem was. Pinning is to the edge of the frame. My frame was simply to big.

Thanks anyway.
Klaas


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