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MurmilePie
Participant
May 18, 2017
Answered

After Effects what does this script do?

  • May 18, 2017
  • 2 replies
  • 1622 views

After Effects Tutorial: Audio Spectrum Effect [Trap Nation] - YouTube

I'm doing a couple of intros on After Effects and I'm pretty new to it. In the video above, this script, value + (comp("Music").layer("Audio Amplitude").effect("Both Channels")("Slider"))/10 is used along with value + (comp("Music").layer("Audio Amplitude").effect("Both Channels")("Slider"))/30 and value + (comp("Music").layer("Audio Amplitude").effect("Both Channels")("Slider"))/5 .

Times they are mentioned:

11:08

Why? I've made another video without using those scripts and it turned out fine for the particles and such. What do they do?

    This topic has been closed for replies.
    Correct answer Horshack

    That specific expression is taking the initial value of that property ("value") and then adding to it the value defined by the Expression Control slider (with some scaling/arithmetic applied to the slider's value, ie the "/10" and "/30")

    2 replies

    Horshack
    Horshack
    Legend
    May 18, 2017

    Start here:

    Dan Ebbert's intro to AE scripting

    Nexahs1138
    Nexahs1138
    Inspiring
    May 18, 2017

    Expressions just make things easier to do, instead of you having to keyframe these things it does it for you.

    Go to videocopilot.net and look in their early tutorials for a list of expressions and helpful tips

    M
    MurmilePieAuthor
    Participant
    May 18, 2017

    Thanks for the reply but I'm still a bit confused.

    Because after I input the script the tutorial video just has us save it then we render.

    What exactly is the script/expression doing to the particles? Telling them when to bounce at a specific time?

    Also thank you for the tutorial site!

    Horshack
    HorshackCorrect answer
    Legend
    May 18, 2017

    That specific expression is taking the initial value of that property ("value") and then adding to it the value defined by the Expression Control slider (with some scaling/arithmetic applied to the slider's value, ie the "/10" and "/30")

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