How to Use a Limiter in Mastering (Parameters Explained)

What Is a Limiter and Why You Need One

Before we get into how to use a limiter in practice, let me define what a limiter actually is. A limiter is basically a compressor on steroids.

If you set a compressor to a ratio higher than 20:1, that is when it starts acting like a limiter. The job of a limiter is simple. It stops audio peaks from going over Full Scale, which is 0 dBFS in the digital world. In a mastering chain, the limiter is generally the last audio processor on your mastering bus. Nothing else touches the signal after it.

Why does this matter so much? Because if any peak crosses 0 dBFS, your master starts clipping and distorting. Analog distortion can actually sound pleasant and add character. Digital distortion usually does not. It sounds harsh, brittle, and cheap. A limiter is the safety net that prevents this from happening.

But the limiter is more than a safety tool. It is also the plugin that lets you push your master up to commercial loudness levels while keeping things transparent. That is why it sits at the heart of every modern mastering chain.

Peak Limiters vs True Peak Limiters

Before we get into the parameters, there is one distinction you need to understand.

A standard Peak Limiter watches the sample-by-sample level of your audio and pulls down anything that would cross the ceiling. That works well in most cases. The catch is that digital audio sits on a sample grid. The actual analog waveform passing through the samples can spike higher than any single sample value. These are called inter-sample peaks, or True Peaks. They are especially common at hot levels and can pass completely undetected by a basic Peak Limiter or even some analyzers.

A True Peak Limiter reconstructs what the analog waveform will actually do between samples and limits that as well. When your track gets converted by a streaming platform, decoded on a phone, or played back through a lossy codec, those inter-sample peaks can cause audible distortion even though your master looked clean on a regular peak meter.

For modern mastering, True Peak limiting is the safer choice. You do not have to use it on every single track, but if you are delivering to Spotify, Apple Music, YouTube, or any streaming service, it is worth the extra CPU.

How to Use a Limiter: The Main Parameters Explained

Let me walk you through the controls you will find on pretty much every limiter. I will use two examples to show how the naming can differ: the stock Pro Tools limiter (a standard Peak Limiter) and FabFilter Pro-L2 (a True Peak Limiter). If you want to hear how Pro-L2 holds up against other mastering limiters on a real mix, I tested it directly in my Sonnox Oxford Limiter review.

1. Input Level

The input meter simply shows the level of the signal coming into the limiter. There is not much to tweak here. It is a reference, not a control.

2. Threshold (or Gain)

Threshold dials in how much of the audio signal you are compressing. As in the case of compressors, this is where you decide how hard the limiter works. But there is a twist. On a limiter, the higher you push the Threshold, the louder the audio signal gets.

On Pro-L2 this exact same parameter is called Gain instead of Threshold. The function is identical. Just the naming is different. It is worth remembering because the first time you open a new limiter, you want to know which knob is actually doing the pushing.

3. Ceiling (or Output Level)

The Ceiling sets the highest level your peaks are allowed to reach. It also determines the distance between the loudest peaks and 0 dBFS.

On Pro-L2 this is called Output Level, and it is measured in dBTP (decibel True Peak), because it is a True Peak limiter.

Here is what I do on my own masters. I set the Ceiling to -1 dBFS. That gives me 1 dB of peak headroom. The reason is simple: some streaming platforms run your master through their own conversion and encoding before it reaches the listener. Those conversions can introduce small errors and push peaks slightly higher. By leaving -1 dB of room, I protect the master from clipping on Spotify, Apple Music, YouTube, and anywhere else the playback chain is out of my hands. This is why I generally recommend a Ceiling of at least -1 dBFS for anything you are delivering commercially.

4. Release

Release is the time it takes for the audio signal to go from compressed (limited) back to dry (uncompressed). A fast Release brings the signal back quickly, which feels louder and more aggressive but can introduce pumping or distortion if pushed too far. A slower Release is smoother and more transparent but does not get as loud. If you want a deeper explanation of how Release and Attack work in general, I covered them in detail in my guide on how to use compression in mixing.

Most modern limiters offer an Auto Release option that adapts to the program material. It is a solid starting point, especially if you are still training your ears on how release affects the sound.

5. Attack

Attack controls how fast the limiter reacts when a peak crosses the Threshold. On many limiters (including the Pro Tools stock one) the Attack is set to automatic. On more advanced limiters like Pro-L2, you can adjust it manually to trade off transient detail against transparency.

6. Lookahead

Lookahead is one of the most important parameters on a modern limiter. It sets how quickly the limiter responds to sudden peaks in the audio signal.

Here is the tradeoff straight from the FabFilter tooltip: with a shorter lookahead time, you can achieve greater loudness, but at the cost of possible distortion. With a longer lookahead, the limiter has more time to prepare for incoming peaks and handles them more transparently, but you lose some of the loudness edge.

This is the classic mastering compromise. Want a louder master? Be ready to pay with some distortion. Want pristine transparency? Be ready to give up some loudness. The art of mastering is finding the right balance for each specific track.

7. Channel Linking

Channel linking controls whether the limiter reacts to the left and right channels together or independently. Linked mode keeps the stereo image stable. Unlinked mode can get you slightly more loudness but may cause subtle stereo shifts on sharp transients. For most masters, linked is the safer choice.

8. Dither and Noise Shaping

Dither applies when you are converting from a higher bit depth to a lower one. For example, going from a 24-bit session down to a 16-bit master for CD or legacy delivery. What dither actually does is add a very low-level noise to your signal to increase the accuracy of the bit-depth conversion.

It sounds counterintuitive (you are adding noise to make things more accurate?), but it works. Without dither, you get quantization distortion, which sounds worse than the tiny amount of dither noise you would replace it with.

Noise shaping pushes that dither noise into frequency ranges where the human ear is less sensitive, making it even less audible. Most limiters offer dither at 16, 18, or 20 bits. If your delivery is staying at 24 bits, you do not need dither. If you are converting down, apply it only once at the very last stage.

9. Oversampling

Oversampling increases the accuracy and quality of the limiter processing by running the internal calculations at a higher sample rate. It costs CPU but gives cleaner limiting, especially at aggressive settings. On Pro-L2 and similar modern limiters, it is worth turning on for final masters.

10. True Peak Detection

On True Peak limiters, there is usually a dedicated option to enable inter-sample peak detection. If your limiter has it, use it on anything heading to streaming.

The Link Trick: A Quick Way to Find the Sweet Spot

Here is a practical technique that works well on limiters with a link option between Threshold and Ceiling.

Link the Threshold and the Ceiling together. Now push the Threshold down until you start hearing a clear difference in the mix. That is your sweet spot. Whatever the limiter is doing at that point is roughly the maximum you can ask of it before the processing becomes obvious. Once you have found that point, unlink the two parameters and bring the Ceiling back up to -1 dBFS (or wherever your headroom target is). You have now set your limiter to push the master as hard as it can go while still sounding transparent.

This is not the only way to use a limiter, but it is a fast, repeatable workflow that takes a lot of the guesswork out of the process. Once you have done it on a few tracks, you start to develop an instinct for how much headroom your mixes actually have before the limiter starts telling on you.

Common Limiter Plugins Worth Knowing

Every major plugin maker has a limiter, and a handful have become industry standards. Here are the ones you will run into most often:

• FabFilter Pro-L2. A True Peak limiter with flexible algorithms, solid metering, oversampling, and excellent lookahead control. This is my go-to on most masters.
• Waves L1, L2, L3, and L3-16. Industry classics. The L1 and L2 are responsible for the loudness of a huge number of commercial records from the late ’90s onward.
• iZotope Ozone Maximizer. Part of the Ozone mastering suite. Multiple IRC algorithms that handle different kinds of material differently. I covered this one in depth in my iZotope Ozone 9 Maximizer review.
• Pro Tools Stock Limiter. Surprisingly usable for a free plugin. Good for reference and quick checks.
• Sonnox Oxford Limiter. Known for its Enhance function that adds density without obvious pumping. I tested it against FabFilter Pro-L2 and the TC Electronic Brickwall in my Sonnox Oxford Limiter review.
• Newfangled Audio Elevate. A spectral multiband limiter that takes a totally different approach, limiting different frequency bands independently.

There is no single “best” limiter. Different tracks respond better to different algorithms. Over time you build a short list of two or three you reach for regularly, and each one has its own character.

Common Mistakes When Learning How to Use a Limiter

A few habits will ruin even the best limiter:

• Slamming it too hard. If your gain reduction meter is showing 6+ dB of limiting on average, you are asking the limiter to do what a proper mixing or compression stage should have done earlier. Fix it upstream, not at the end.
• Setting the Ceiling at 0 dBFS. This almost guarantees inter-sample peaks and streaming distortion. Use -1 dBFS minimum.
• Chasing loudness at any cost. LUFS targets matter, but a distorted, pumping master is worse than one that is 1 dB quieter and sounds clean. Streaming platforms normalize loudness anyway. If you need a reality check on how loud your master should feel, compare it against reference tracks from the same genre.
• Using a Peak Limiter when True Peak is needed. If your delivery is going to streaming, enable True Peak detection.
• Applying dither twice. Dither happens once, at the final bit-depth reduction. Never on a signal that will be processed again.
• Ignoring the bypass button. A/B the limiter against the unprocessed signal regularly. Your ears adapt fast, and you need to hear what the limiter is actually doing. This is also where a properly set up studio listening environment becomes critical, because if you cannot trust what you are hearing, you cannot trust the decisions you are making on the limiter.

Key Takeaways

• A limiter sits at the end of your mastering chain and stops peaks from crossing 0 dBFS, preventing digital clipping and distortion.
• Peak Limiters catch sample-level peaks. True Peak Limiters also catch inter-sample peaks, which matters for streaming delivery.
• The key parameters are Threshold (or Gain), Ceiling (or Output Level), Release, Attack, and Lookahead. Each has tradeoffs between loudness and transparency.
• Set your Ceiling to -1 dBFS to protect against streaming platform conversion errors.
• The Threshold/Ceiling link trick is a fast way to find the loudest setting your track can take before the limiter becomes audible.
• The bottom line: the job of a limiter is to make your master louder and more competitive, as transparently as possible.

Related Articles

• Sonnox Oxford Limiter Review: Honest Mastering Test. An honest test of the Sonnox Oxford Limiter against FabFilter Pro-L2 and the TC Electronic Brickwall, with real audio examples.
• iZotope Ozone 9 Maximizer Review. A deep dive into the Ozone Maximizer, its IRC algorithms, and how it compares to FabFilter Pro-L2 on a real master.
• How to Set Up Your Studio Listening Environment. A loud, transparent master still depends on what you hear at the listening position. This guide covers monitor placement, calibration, and headphones.
• The Mixing & Mastering Cheat Sheet. A free one-page reference of the checks and moves I use on every session, including final limiter settings.

Ready to Go Deeper?

Understanding how to use a limiter on paper is one thing. Actually using it inside a full mastering session, with a real mix, a real client, and a real deadline, is where the craft gets built. I put together three programs to cover the whole journey, depending on where you are right now.

About the Author

Adrian Milea is a mixing and mastering engineer, music producer, and educator with over 25 years in the industry. His work has been released on Armada Music and featured in DJ Mag. Through adrianmilea.com and his online courses, he teaches the technical and business sides of making records that compete at a professional level.

Until next time, Stay Cool and Make Great Music!
-Adrian