How to compress an acoustic guitar

For most acoustic guitars, set threshold around −16dB, ratio 3:1, attack 15ms, release 100ms.

Updated 2026-05-03

Short answer

For most acoustic guitars, set threshold around −16dB, ratio 3:1, attack 15ms, release 100ms. Aim for 3–5dB of gain reduction. Light compression evens out strums and fingerpicks so the guitar sits in the mix without disappearing on quiet passages.

Threshold: −16 dB, aim for 3–5 dB of gain reduction
Ratio: 3:1, gentle, transparent
Attack: 15 ms, preserves pick and string attack
Release: 100 ms, recovers between strums
Knee: 6 dB, soft for natural feel

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Aim for 3–5dB gain reduction

Acoustic guitar dynamics span huge ranges, gentle fingerpicked verses next to loud strummed choruses. 3–5dB of gain reduction smooths this without flattening the performance. For solo acoustic recordings, lighter (2–3dB) keeps natural dynamics; for full-band mixes, push to 6dB so the guitar holds its place.

Ratio 3:1 stays transparent

3:1 is gentle enough to be invisible while still controlling dynamics. 4:1 starts to add character, useful if you want the acoustic to feel 'glued' to a band mix. Above 6:1 the acoustic loses its natural breath and starts to sound choked.

Attack 15ms keeps the pick

Pick attack and string articulation live in the first 5–15ms. A fast attack (1–5ms) clamps the attack and the guitar sounds dull and lifeless. 15ms is the sweet spot. For fingerpicked playing where the attack is softer, push to 20–25ms.

Release 100ms tied to strum rhythm

Set release so the compressor fully recovers between strums. At 100 BPM with quarter-note strums, you have 600ms between hits, 100ms release recovers comfortably. For fast strumming (eighth notes at 140 BPM), drop release to 60ms. If you hear pumping between strums, slow it down.

Frequently asked

Should I compress an acoustic guitar?

Almost always yes for full-band mixes, the dynamic range is too wide to sit in the mix without compression. For solo acoustic recordings or sparse arrangements, light compression (2–3dB) preserves natural dynamics; heavy compression kills the character.

How much compression on acoustic guitar?

3–5dB of gain reduction for full-band mixes. 1–3dB for solo acoustic or sparse arrangements. More than 6dB and the guitar starts to lose its natural breath and the strums sound choked.

Can I use parallel compression on acoustic?

Yes, useful for adding body and sustain to fingerpicked passages without losing the dry attack. Send to a parallel bus with heavier compression (6:1, fast attack), blend underneath at −15dB. The dry signal keeps the attack; the parallel adds the body.

Should I compress acoustic before or after EQ?

Subtractive EQ (high-pass at 100Hz, 200Hz cut) before compression so the compressor reacts to a clean signal. Boosts (5kHz pick attack, air shelf) after compression so they aren't squashed. A typical chain: HP → cut 200Hz → compress → boost top end.

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