Attack and release are the two knobs that make or break compression — and the two most misunderstood. This guide explains what they actually do, how to HEAR them, and gives starting settings for every source.
Attack is how long the compressor waits before clamping down after the signal crosses the threshold. It's not "how hard" — it's "how soon".
"Want punch? Slow the attack down. This is backwards from what most beginners expect."
Release is how long the compressor takes to let go after the signal drops below the threshold.
The golden rule for release: time it to the track. The gain reduction meter should bounce back to zero right before the next hit. If it never reaches zero, your release is too slow and the whole track is being squashed constantly.
| Source | Attack | Release | Ratio | GR target |
|---|---|---|---|---|
| Kick | 5–10ms | 50–100ms | 4:1 | 3–6dB |
| Snare | 1–5ms | 80–150ms | 4:1 | 3–6dB |
| Drum bus | 10–30ms | auto / 100ms | 2–4:1 | 2–4dB |
| Bass / 808 | 10–30ms | 100–200ms | 4–6:1 | 3–5dB |
| Lead vocal | 2–10ms | 60–150ms | 3–4:1 | 4–8dB |
| Mix bus | 30ms | auto | 1.5–2:1 | 1–3dB |
These are starting points, not laws. Set them, then close your eyes and adjust attack until the punch is right, then release until the groove breathes. Trust ears over numbers — but start from numbers that are in the right neighborhood.
MPL's mixing lessons include an interactive compressor you can sweep in real time over real drum loops. Hear attack and release, don't just read about them.
Open Mixing Lesson 1 →Compression before/afters and settings breakdowns in 60 seconds. Follow @musicproducerlab.
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