SAMPLED

Synthesis and sound design · updated 2026-08-16

ENVELOPE (ADSR)

Attack, decay, sustain, release — how a parameter moves over the life of a note. Applied to volume, filter, pitch, anything.

Close-up of a Eurorack modular synthesizer: oscillator, filter and envelope modules wired together with patch cables, showing the signal path these synthesis terms describe.
Synthesis and sound design — Close-up of a Eurorack modular synthesizer: oscillator, filter and envelope modules wired together with patch cables, showing the signal path these synthesis terms describe.

Photo: Eurorack Modular Synthesizer Closeup (opens in a new tab) by Nir Yaniv (opens in a new tab), via Wikimedia Commons — CC BY-SA 4.0 (opens in a new tab)

Key takeaways

  • Attack, decay, sustain, release — how a parameter moves over the life of a note.
  • Applied to volume, filter, pitch, anything.
  • Envelopes are not just for volume — routing them to filter, pitch or modulation depth is where most sound design happens.
  • Slow attack and long release on a filter envelope turns the same patch from a pluck into an evolving pad.
  • Watch out: setting a zero-millisecond attack on every patch.

Quick checklist

  • Can you define envelope (adsr) in one sentence without looking?
  • Can you point at envelope (adsr) 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?

ENVELOPE (ADSR) IN DEPTH

An envelope describes how a parameter changes over the life of a note: attack to the peak, decay to a sustain level, sustain held while the key is down, release after it lifts. Envelopes are not just for volume — routing them to filter, pitch or modulation depth is where most sound design happens.

How it works in practice

Slow attack and long release on a filter envelope turns the same patch from a pluck into an evolving pad.

The mistake people make

Setting a zero-millisecond attack on every patch. A one- or two-millisecond attack removes clicks without softening the perceived punch.

WHERE ENVELOPE (ADSR) SITS

Envelope (ADSR) belongs to synthesis and sound design in the Sampled music glossary. How synths make sound, in the order the signal actually travels.

TERMS THAT DEPEND ON ENVELOPE (ADSR)

  • Modulation matrix

    A routing grid that connects sources (LFOs, envelopes, velocity) to destinations (cutoff, pitch, pan) with an amount for each.

TEST YOURSELF

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3 quick questions on envelope (adsr). Answers are marked instantly — nothing is sent anywhere.

  1. 1. Which statement best describes envelope (adsr)?

  2. 2. What is the mistake people most often make with envelope (adsr)?

  3. 3. In practice, which of these applies to envelope (adsr)?

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 envelope (adsr) — standards bodies, manufacturers, government offices and university course material. Each one lists the line of this entry it backs up.

  • Ableton — Learning Synths (envelopes) (opens in a new tab)

    Manufacturer learning resource · Ableton

    “Attack, decay, sustain, release — how a parameter moves over the life of a note.”— the claim this source supports

    Why it counts: A free, hands-on explainer from a DAW maker — useful for hearing the concept rather than only reading it.

  • Sequential — product manuals (opens in a new tab)

    Primary reference · sequential.com

    “Applied to volume, filter, pitch, anything.”— the claim this source supports

    Why it counts: Published by the organisation responsible for the thing being defined, so it is a first-hand source rather than a summary of one.

RELATED TERMS IN SYNTHESIS AND SOUND DESIGN

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