Compressor Attack and Release Explained
(With Settings That Work)

What Attack Actually Does

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".

• Fast attack (0.1–3ms): catches the transient. The initial "hit" of the drum gets squashed → smoother, smaller, more controlled sound
• Slow attack (10–30ms): lets the transient through, then compresses the body → MORE punch, because the hit pokes out above the compressed tail

What Release Actually Does

Release is how long the compressor takes to let go after the signal drops below the threshold.

• Fast release (20–80ms): compressor recovers quickly → louder, more aggressive, can distort low frequencies if too fast
• Slow release (200ms+): smooth, gentle leveling → transparent, but can choke the groove if the compressor never fully recovers between hits

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.

Starting Settings That Work

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

How to Actually Hear It (Exercise)

• Put a compressor on a drum loop with heavy gain reduction (10dB+, exaggerated on purpose)
• Sweep attack from fastest to slowest — listen to the transient appearing and disappearing
• Sweep release from fastest to slowest — listen for pumping (fast) vs choking (slow)
• Then dial back to normal gain reduction (3–6dB). Now you know what you're listening for