What is the theroy behind the "adaptive limiter"?

Discussion in 'Mastering' started by Giant_Pandas, Jun 16, 2006.

  1. Giant_Pandas

    Giant_Pandas Guest

    I've been checking a lot of websites and references and haven't found enough information on the subject. I guess the limiter is normally used under mastering phase. Can anyone explain or direct me to some website? Cheers!
     
  2. Thomas W. Bethel

    Thomas W. Bethel Well-Known Member

    Adaptive can mean different things.

    In an adaptive limiter the adaptive part can refer to frequency or timing. This is usually done in a look ahead manner which allows the limiter to anticipate the changes it needs to make to the signal to keep it within the parameters you have set for it.

    There were a couple of plug ins that did this along with a couple of pieces of hardware that also did this. It is a way of getting the maximum level from your music without going into overload or distortion. I have never personally used one but the concept is a good one. Probably hard to implement properly.

    Hope this helps!
     
  3. Michael Fossenkemper

    Michael Fossenkemper Distinguished past mastering moderator Well-Known Member

    Like what Thomas said. Basically it looks at the signal and changes it's parameters based on the signal to hopefully sound better.
     
  4. saemskin

    saemskin Active Member

    I dont understand how a limiter can look ahead in real time.
    It seems that the math involved in anticipating the changes in something as complex as an audio waveform would be above and beyond what a pc is capable of.
    Or am I looking at this from the wrong angle?
     
  5. Thomas W. Bethel

    Thomas W. Bethel Well-Known Member

    See here

    http://www.omniaaudio.com/tech/lookahead.htm
     
  6. Giant_Pandas

    Giant_Pandas Guest

    Thank you guys!
     

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