Kick Lab 06 · 14 min

Compression Lab

Compare dry and compressed kicks while threshold, ratio, attack, release and makeup gain reveal envelope tradeoffs.

Controlled experiment

Change one cause. Hear the result.

Before moving a control, predict what will change. Use the play controls to compare at a comfortable level.

Audio starts only when you press a play button.

-18 dB
Level above which compression begins.
4:1
Strength of gain reduction above threshold.
18 ms
How quickly gain reduction reacts.
160 ms
How quickly gain reduction recovers.
2 dB
Output gain after compression.
What changed

Move one control and listen for the relationship.

Gain reductionUpdates with the controls
Gain reduction is ready. Move a control to inspect the change.
Envelope comparisonUpdates with the controls
Envelope comparison is ready. Move a control to inspect the change.

Attention guide

Listen for these three things.

  • 1Whether the first peak passes before gain reduction
  • 2Body rising relative to the transient
  • 3Pumping between repeated hits

Guided practice

Three experiments worth doing.

Do them in order. Reveal “What to notice” only after you have described the result in your own words.

  1. 01

    Catch versus preserve

    Compare Attack at 1 ms and 35 ms with the same threshold and ratio.

    What to notice

    Fast attack can control the arrival; slower attack can preserve it while compressing later energy.

  2. 02

    Remove the loudness bias

    Set Makeup to match the dry perceived level.

    What to notice

    The better comparison is often less dramatic once loudness is controlled.

  3. 03

    Hear recovery

    Set Release to 40 ms, then 500 ms.

    What to notice

    Short release can recover audibly; long release can hold the kick down into the next event.

Check your model

Why should dry and compressed versions be level-matched?

Choose the answer that explains the cause, not merely the symptom.

Close the loop

Can you explain the result without the controls?

If you can name the cause, the audible change and the musical tradeoff, the concept is ready to transfer into your own session.