SAMPLED

Mixing and mastering · updated 2026-08-16

PARALLEL COMPRESSION

Blending a heavily compressed copy under the untouched signal. You get density without flattening the transients.

A Solid State Logic Matrix mixing console with channel strips, faders and pan pots — the desk layout behind the gain, EQ and balance terms in this section.
Mixing and mastering — A Solid State Logic Matrix mixing console with channel strips, faders and pan pots — the desk layout behind the gain, EQ and balance terms in this section.

Photo: Solid State Logic (SSL) Matrix Mixing Console at Audio Mix House, Studio C (opens in a new tab) by Audio Mix House (opens in a new tab), via Wikimedia Commons — CC BY 2.0 (opens in a new tab)

Key takeaways

  • Blending a heavily compressed copy under the untouched signal.
  • You get density without flattening the transients.
  • You get the density and sustain of hard compression while the original transients stay intact, which is why it is standard on drums and vocals.
  • Send drums to an aux, compress it hard with a fast attack, and blend it under the dry bus until the kit feels solid.
  • Watch out: forgetting the latency of the parallel path.

Quick checklist

  • Can you define parallel compression in one sentence without looking?
  • Can you point at parallel compression in a real session, mix or contract?
  • Have you tried the practical move above at least once?
  • Would you catch the common mistake before it costs you a take?
  • Have you opened one of the primary sources below rather than a forum thread?

PARALLEL COMPRESSION IN DEPTH

Parallel compression blends a heavily compressed copy of a signal with the untouched original. You get the density and sustain of hard compression while the original transients stay intact, which is why it is standard on drums and vocals.

How it works in practice

Send drums to an aux, compress it hard with a fast attack, and blend it under the dry bus until the kit feels solid.

The mistake people make

Forgetting the latency of the parallel path. If the plugin does not report delay correctly, the blend partially cancels rather than adds.

WHERE PARALLEL COMPRESSION SITS

Parallel compression belongs to mixing and mastering in the Sampled music glossary. The processing vocabulary, plus the loudness standards streaming services actually measure you against.

TEST YOURSELF

0/3 answered · 0 correct

3 quick questions on parallel compression. Answers are marked instantly — nothing is sent anywhere.

  1. 1. Which statement best describes parallel compression?

  2. 2. What is the mistake people most often make with parallel compression?

  3. 3. In practice, which of these applies to parallel compression?

Ready for the full thing? Take the 25-question terminology test and get a certificate with your name and score.

SOURCES AND CITATIONS

Free, primary references for parallel compression — standards bodies, manufacturers, government offices and university course material. Each one lists the line of this entry it backs up.

  • AES technical library (opens in a new tab)

    Professional standards body · Audio Engineering Society

    “Blending a heavily compressed copy under the untouched signal.”— the claim this source supports

    Why it counts: AES writes and reviews the engineering standards and peer-reviewed papers this terminology comes from.

  • Stanford CCRMA — audio effects (opens in a new tab)

    University research centre · Stanford CCRMA

    “You get density without flattening the transients.”— the claim this source supports

    Why it counts: The CCRMA course material derives this from first principles, so you can check the maths behind the plain-English version above.

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