• Adobe After Effects

  Colour that changes when the bass from the music hits

  Posted by Jonathan Sikkema on July 27, 2015 at 2:50 pm

  Hello people off the internet 🙂

  I want to make something but i dont know how…
  I will post a video link so you know what i mean: https://www.youtube.com/watch?v=MPI9kdP6n6o

  I can make the spectrum and everyting else accept that color changing on the music. Can someone help me with that?? 🙂 I have adobe after effects CS6

  Have a great day and thanks in advance.

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  John Cuevas replied 11 years, 1 month ago 3 Members · 4 Replies
• 4 Replies

• 

  Richard Herd

  July 27, 2015 at 10:03 pm

  That requires an expression from the math and design guru, Dan Ebberts.

  By DAN EBBERTS
  //change colors to the beat

  threshold = 10.0;

  colors = [[255,205,47,255]/255,[213,116,45,255]/255];

  audioLev = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);

  above = false;
  frame = Math.round(time / thisComp.frameDuration);
  n = 0;
  while (frame >= 0){
  t = frame * thisComp.frameDuration;
  if (above){
  if (audioLev.valueAtTime(t) < threshold){
  above = false;
  }

  }else if (audioLev.valueAtTime(t) >= threshold){
  above = true;
  n++;
  }
  frame–
  }

  colors[n%colors.length]
• 

  Jonathan Sikkema

  July 27, 2015 at 11:26 pm

  Thanks for the reply!

  I am trying to figure out how it works but till now i havent done that yet…
  Can u say me what i need to do so i can get it to work??

  Thanks in advance!
• 

  John Cuevas

  July 28, 2015 at 2:51 pm

  Seems to be a line missing from the expression that Dan originally posted. To use this expression, you need to select your audio layer, go the “Animation” drop down > Keyframe Assistant > Convert Audio to Keyframes. That will drive your color changes.

  Then add a fill to your spectrum, alt + click the color stopwatch and add this expression. In my example I have it set to 3 colors, RGB, you can add more colors by adding a “, [0,0,255,255]/255]” to the end of the expression, just make sure you take the last bracket ] off the previous color.

  threshold =10.0;

  colors = [[255,0,0,255]/255,[0,255,0,255]/255, [0,0,255,255]/255];

  audioLev = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider");

  above = false;
  frame = Math.round(time / thisComp.frameDuration);
  n = 0;
  while (frame >= 0){
  t = frame * thisComp.frameDuration;
  if (above){
  if (audioLev.valueAtTime(t) < threshold){
  above = false;
  }

  }else if (audioLev.valueAtTime(t) >= threshold){
  above = true;
  n++;
  }
  frame--
  }

  colors[n%colors.length]

  Johnny Cuevas, Editor
  ThinkCK

  “I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
  —THOMAS EDISON on inventing the light bulb.
• 

  John Cuevas

  July 28, 2015 at 2:54 pm

  Here’s a simple project(minus the audio) that shows how you place the effect and expression.

  9088_audiobeatexrpession.aep.zip

  Johnny Cuevas, Editor
  ThinkCK

  “I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
  —THOMAS EDISON on inventing the light bulb.

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