Audio Compression

Audiodrome Toggle Info   |   Last Updated: May 9th, 2025   |   8 min read   |   Glossary

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Compression is audio signal processing that reduces the difference between louder and quieter parts of a sound. It is used to control dynamics, increase consistency, and help elements sit more evenly in a mix.

Quick facts line:
 Also called: dynamic compression
Affects: loudness control and consistency
Related to: threshold, ratio, attack, release
Not the same as: file compression

One practical example:
 A vocal recording has very soft verses and very loud choruses. Compression can narrow that range so the performance stays more even in the mix.

Gotchas:

  • Audio compression is different from MP3 or file-size compression.
  • Too much compression can flatten transients and reduce natural dynamics.
  • Compression directly affects dynamic range.
  • Bad gain staging before compression can create unwanted results.

FAQs

Indirectly, often yes, but its main job is dynamic control.

If your audio sounds dull, lifeless, or “squeezed,” you may be overcompressing. Watch for pumping artifacts, unnatural volume fluctuations, or loss of punch. Use your ears, not just meters, and bypass the compressor occasionally to compare.

No. Overuse can make audio sound squashed or lifeless.

Analog compressors color the sound due to circuit behavior – this can be musically pleasing. Digital compressors are more transparent and flexible. Many plugins now emulate analog units to give users both character and control.

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Related terms:
 Dynamic Range • Headroom • Gain Staging • Clipping • Audio Mixing