Dynamic Range Compression

Dynamic Range is the difference between the loudest part and the softest part of a piece of music.

A good example of compression is the audio for some TV ads which seems so much louder than the relatively quiet movie you are watching.

In reality, the maximum loudness is of the advertisement and the program is no different, but the average loudness of the ad is very much higher.

Compression is achieved by detecting the loudness and reducing the loudness of the loudest parts before bootsing the loudness of the audio as a whole.

Two main compressor topologies :

  • feed-forward
  • feedback

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