Compression

Description

An overview of the compression plugin and the various settings in it.
j.reilly
Mind Map by j.reilly, updated more than 1 year ago
j.reilly
Created by j.reilly over 8 years ago
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Resource summary

Compression
  1. Compression is the process of reducing the dynamic range between the loudest and quietest parts of an audio signal. This is done by boosting the quieter signals and attenuating the louder signals. Compression is mainly used on vocals, however can and should be used across the board of mixes, to ensure full control of the final mix. Compression should be enough to control the mix, and whenever using the effect it should not be obtrusive – this is all how your own ears perceive the sounds however.
    1. Threshold – The level at which compression starts being applied.
      1. Ratio – How much compression is applied. For example, if the compression ratio is set for 6:1, the input signal will have to cross the threshold by 6 dB for the output level to increase by 1dB.
        1. Attack – how quickly the compressor starts to work
          1. Release – how quickly after the signal drops below the threshold the compressor stops
            1. Knee – sets how the compressor reacts to signals once the threshold is passed. Hard Knee settings mean it clamps the signal straight away, and Soft Knee means the compression kicks in more gently as the signal goes further past the threshold.
              1. Timeline of Compression: 1930s-40s – Compression created to control volume of TV/Radio presenters whispering/talking quietly as-well as an entire audience clapping. The first compressors just had In/Out functions and no other controls. 1937 – ‘The Western Electric 110 limiting amplifier created, being considered to be the first commercially available compressor. 1980s – DAWs included Compression as standard in their software, rather than needing Compression Racks. 2007 – Tracks started using less heavy compression, experimenting with different compression levels
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