• Adobe After Effects Expressions

  Making audio react to opacity

  Posted by Dumeyni Arnaud on July 24, 2008 at 1:14 pm

  Hi all, thank you for reading this.

  I’m a little noob with expressions and now I just realized i REALLY a noob.

  I’m trying to make the audio level of a sfx go up and down along with one layer’s opacity : when the opacity go down, the audio goes up, and vice versa.

  I linked the audio level to the opacity, plus a linear expression :

  temp = thisComp.layer(“fond anime.avi”).transform.opacity;
  [temp, temp];
  S=linear(temp,0,100,-48,0);
  [S,S]

  But the audio levels aren’t changing.
  Any ideas ? Please.. I can do your laundry 🙂

  Lloyd Alvarez replied 17 years, 9 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Lloyd Alvarez

  July 24, 2008 at 9:09 pm

  you don’t need the temp array, but it should work regardless. try this:

  temp = thisComp.layer(“fond anime.avi”).transform.opacity;
  S=linear(temp,0,100,-48,0);
  [S,S]

  -Lloyd

  https://aescripts.com
• 

  Dumeyni Arnaud

  July 25, 2008 at 1:57 pm

  Thanks Lloyd, I’ve tried but its not working.
  I tried it again in a freshly created comp ( the solid and the audio ) its still didn’t worked.

  Its ok I just keyframed the audio level manually but i’m still curious why a simple expression like this didn’t worked out.
• 

  Lloyd Alvarez

  July 25, 2008 at 1:59 pm

  where are you applying the expression? it works for me here

  https://aescripts.com

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