Short answer: attack sets how much of the transient gets through — fast (0–3 ms) tames peaks and adds body, slow (10–30 ms) lets the hit through and adds punch. Release sets how quickly the compressor lets go: time it so the meter returns to zero just before the next beat. Start medium on both and adjust by ear.
In this blog post, Major Mixing – Online Mixing and Mastering Service will discuss how to set compressor attack and release times. We’ll go over what they are, why you need them, and some best practices for setting them. If you’re looking for a complete guide on the subject of compression’s attack and release settings, then this is it!
What are compressor attack and release?
Compressor attack and release times are two of the most important settings. They determine how the compressor will respond to incoming audio signals and can have a huge impact on your final mix.
Attack time is the amount of time that dictates how long it takes for the compressor to reach approximately 2/3d of its full compression. It shows how many peaks or transients will pass through the compressor without getting compressed.
Release time is the amount of time the compressor will still be working after the signal has moved below the threshold.
Both attack and release times are measured in milliseconds (ms). The lower the number, the faster the response time.
How attack and release affect audio?
You’ll want to set these times according to the specific material you’re compressing.
First, we need to understand how different settings of attack time affect the audio.
Fast attack (0-3ms)
Fast attack is good to add body to the sound or tame spiky transients.
Medium attack (3-8 ms)
This is a good starting point in most cases. It’s fantastic for giving dynamic control when you don’t want to completely eliminate transients.
Slow attack (10-30 ms)
Slow attack is great for adding punch to your sound.
Now let’s consider the release time for compression.
Fast release (50-100 ms)
The fast release time of a compressor is great for controlling spiky transients or reining in the feedback.
Medium release (100-200 ms)
This setting works well with most material and helps maintain some dynamic range while still keeping things controlled.
Slow Release (over 300ms)
A slow release setting is excellent for enhancing a sound’s sustain and musicality.
How to set Compressor Attack and Release?
First of all, we need to figure out what exactly we want to get, and the choices also depend on what instrument we want to compress.
There can be many different situations and many options. Each instrument can be recorded in a different way, songs have different tempos, dynamic ranges, etc.
How to set up an attack?
Let’s start with drums. While listening to drums, you can precisely hear the attacks, they will help you decide. If you want a punchy sound – use a slow compressor attack setting. If you need a huge longtail sound – use a short attack. That’s pretty simple:)
For the rest of the instruments, we usually use a medium attack. It works well in most cases. Sometimes we can use small attack time to make sound squashed and jumping to the face. It works perfectly, for example, on bass guitar or rap vocals.
Slow attack times work best on drums or on the master bus. We don’t use it for instruments except for bass, because they usually don’t contain any “punch” in a sound.
How to set up a release?
For drums, it’s better to use the “tempo” approach. Just find time in ms between notes and that would be your release.
You can use this chart for it
Or you can simply look at your gain reduction meter. Notice when the needle of the compressor returns to its original position just before each beat, this will give you the idea of the needed release time.
For the rest of the instruments, you need to use your ears. If you want to squash/limit your sound – use short release (50-10 ms), if you want to keep it natural – use long release time (200+ms).
The great universal starting point is 100 ms. You can use it if you don’t have much experience yet.
Hope you find it helpful. Feel free to ask us any questions using our LiveChat:)
| Source | Attack | Release | What you’re going for |
|---|---|---|---|
| Lead vocal | 5–10 ms | 40–100 ms | Even level without flattening consonants. Auto release works well here. |
| Kick | 10–20 ms | 80–150 ms | Let the beater through, then control the body behind it. |
| Snare | 10–30 ms | 100–200 ms | Keep the crack, bring up the ring and the room behind it. |
| Bass DI | 10–30 ms | 100–200 ms | Consistent note-to-note level so the low end sits still. |
| Drum bus | 10–30 ms | 100–300 ms | Glue. Release timed to the track so the kit breathes with the tempo. |
| Acoustic guitar | 15–30 ms | 150–300 ms | Control strum dynamics while keeping pick detail. |
| Mix bus | ~30 ms | 100–300 ms or auto | 1–2 dB of gain reduction, no more. Cohesion, not control. |
Starting points, not rules — every one of these moves with tempo, arrangement and how the part was played. A useful habit for release: set it so the meter returns to zero just before the next beat lands. At 120 BPM that’s roughly 250 ms per quarter note.
Attack and release FAQ
Does a fast attack make a sound punchier?
Usually the opposite. A fast attack clamps down on the transient, which is the part that reads as punch. If you want a drum to hit harder, slow the attack down so the stick or beater passes through untouched and the compressor works on the body behind it.
How do I know if my release is too fast?
You’ll hear the level surging between notes — a pumping or breathing effect where the background noise rises every time the signal drops. On a bass or a vocal it usually sounds like distortion in the low mids. Slow the release until the movement settles.
Should I use auto release?
Often, yes. Auto release adapts to the material and is hard to beat on vocals and full mixes, where the programme changes constantly. Manual release earns its place on rhythmic sources, where timing the release to the tempo is exactly the point.
How much gain reduction should I aim for?
On individual tracks, 3–6 dB on the loudest moments is a normal working range. On the mix bus, 1–2 dB. If you need much more than that, the problem is usually level automation or the arrangement, not the compressor.
Do attack and release times mean the same thing on every compressor?
No. Manufacturers measure them differently, and many classic designs are program-dependent — the actual timing shifts with the signal. The numbers on an 1176 and on a digital compressor are not directly comparable, so treat the dial as a starting point and trust the meter and your ears.
Should I compress before or after EQ?
Both are valid and they do different jobs. EQ first when you’re removing something that’s triggering the compressor unnecessarily, such as a low-end rumble. Compression first when you want the EQ to shape a level that’s already stable.
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