Quick Answer β€” Updated May 2026

A limiter prevents audio from exceeding a set ceiling level β€” it is a compressor with an infinite ratio, used to catch peaks in mixing and maximise loudness in mastering. Set the ceiling to -1.0 dBTP, raise the input gain until your loudness target is reached (typically -14 LUFS integrated for streaming), and stop before the sound becomes distorted or flat. Less limiting is almost always better β€” the limiter's job is to be transparent, not audible.

Updated May 2026

A limiter is one of the most powerful β€” and most misused β€” tools in music production. Used correctly, it brings a mix to competitive loudness while protecting the output from clipping. Used incorrectly, it destroys transients, flattens dynamics, and produces a fatiguing, distorted master that no streaming platform can rescue.

This guide covers everything you need to know: how limiters work at a technical level, every key parameter and what it actually does to your audio, true peak limiting and why it matters for streaming, loudness normalisation targets for every major platform, practical mastering workflows, and the most common mistakes producers make when reaching for a limiter.

Whether you are finishing your first beat or trying to get your masters to sit alongside professional releases, this guide will give you a complete, accurate picture of how to use a limiter correctly.

What Is a Limiter and How Does It Work?

A limiter is a dynamics processor designed to do one specific thing: prevent an audio signal from exceeding a defined ceiling level. Think of it as an invisible wall. Any audio that approaches or tries to cross that wall is caught and pulled back down instantly. Nothing gets through above the threshold.

The technical definition: a limiter is a compressor with an infinite (∞:1) ratio. Where a compressor with a 4:1 ratio reduces a signal by 1 dB for every 4 dB it exceeds the threshold, a limiter reduces it so severely that the signal cannot meaningfully exceed the ceiling at all. In practice, most modern digital brickwall limiters achieve ratios of 100:1 or greater β€” effectively a brick wall.

The signal flow inside a limiter looks like this:

Audio Input e.g. -3 dBFS peak Input Gain +3 dB added peaks now at 0 dBFS Gain Reduction Peaks caught -3 dB GR applied Output -1.0 dBTP ceiling no peak exceeds limit Input gain raises overall level β†’ GR catches peaks β†’ output stays controlled at ceiling

Limiters serve two primary functions in music production. In mixing, they are used to catch unpredictable transient peaks β€” a snare drum hit that is 6 dB louder than the rest, a vocalist who surges unexpectedly, a bass note that overloads the mix bus. In mastering, they are the final stage that brings overall loudness up to commercial standards while preventing the exported file from exceeding 0 dBFS (or the true peak equivalent).

Understanding these two use cases separately is important because the settings and intentions differ significantly. A limiter protecting a drum bus in your mix can be looser, more coloured, and more aggressive. A mastering limiter at the very end of the chain needs to be transparent, accurate, and precisely configured.

Limiter vs Compressor: The Critical Difference

The distinction between compressors and limiters is often confused by beginners, and for good reason β€” they are built from the same fundamental mechanism. Both detect when a signal exceeds a threshold and apply gain reduction. The difference is in the ratio and the intent.

A compressor with a moderate ratio (2:1 to 6:1) reduces gain gradually and can be used creatively β€” to add sustain to a guitar, punch to a drum, or glue to a mix bus. The gain reduction is audible as a part of the sound, and that audibility is often the point. Understanding compression fundamentals is essential before reaching for a limiter, because the two tools work in concert.

A limiter with its extreme ratio is not typically heard as a creative effect β€” its job is to be transparent, to catch what should not be there without drawing attention to itself. When a limiter's gain reduction becomes audible β€” when you can hear the music pumping, distorting, or breathing β€” that is a sign you are asking the limiter to do too much.

Here is a quick comparison of the two tools:

Parameter Compressor Limiter
Ratio 2:1 to 20:1 (variable) ∞:1 (effectively 100:1 or higher)
Primary purpose Shape dynamics and tone Catch peaks, control maximum output
Audibility Often intentionally audible Should be transparent
Attack Adjustable (0.1ms to 300ms+) Extremely fast, often with lookahead
Typical placement Individual tracks, bus Master bus, final stage
Gain reduction amount 2–10 dB typical for effect 1–4 dB ideal; more indicates issues upstream
Creative use Yes β€” sustain, punch, glue Rarely β€” mostly utility

The limit has been crossed from controlled to problematic when the limiter's gain reduction becomes audible β€” and that is a problem to solve upstream in the mix or with additional dynamics processing, not by pushing the limiter harder. If you find yourself applying 8 dB or more of limiting on a master, the mix needs work before the limiter can do its job properly. Consider using bus compression earlier in the chain to control dynamics before they reach the limiter.

Core Limiter Parameters Explained

Every limiter β€” whether a simple brickwall plugin or a sophisticated algorithmic processor β€” shares a core set of parameters. Understanding what each one does is essential for using any limiter effectively.

Ceiling (Output Ceiling / True Peak Ceiling)

The ceiling is the maximum level your output signal can reach. Set it correctly and nothing will ever exceed it. This is the most important parameter to get right before touching anything else.

For digital distribution to streaming platforms, the standard ceiling is -1.0 dBTP (true peak) or -0.5 dBTP. The reason for leaving headroom below 0 dBFS is inter-sample peaks β€” a phenomenon explained in full in the True Peak section below. For CD mastering, many engineers still target 0 dBFS or -0.1 dBFS, though -0.3 dBFS has become more common as a safety margin. For video or broadcast, standards like EBU R128 specify both loudness and true peak targets explicitly β€” broadcast often requires -1.0 dBTP maximum true peak alongside specific LUFS integrated targets.

Set your ceiling first. Leave it there. Do not touch it again during your session. Everything else is adjusted around the ceiling β€” not the other way around.

Threshold and Input Gain

Different limiters control loudness in different ways. Some offer a threshold knob β€” setting how far above the threshold triggers gain reduction. Others (like FabFilter Pro-L 2) offer an input gain control that raises the overall level into the fixed ceiling. Both approaches achieve the same result: the more you push the signal into the limiter, the more limiting occurs and the louder the output.

The relationship between input gain and gain reduction is direct. If you raise the input gain by 6 dB and your ceiling stays at -1.0 dBTP, the limiter must apply up to 6 dB of gain reduction on the loudest peaks to keep them below the ceiling. Those 6 dB have to come from somewhere β€” and they come from the transient energy of your peaks, which is what gives your music punch and impact.

This is the core tension in all mastering with a limiter: more input gain equals more perceived loudness, but also more transient reduction, more potential distortion, and less dynamic range. Finding the right balance is the art.

Attack

Attack time determines how quickly the limiter responds to a signal exceeding the threshold. In most modern digital brickwall limiters, the attack is extremely fast β€” often below 1 millisecond β€” to prevent any overshoot reaching the output.

Some limiters use lookahead buffering (typically 1–10 ms) to actually see the transient before it arrives and apply gain reduction in time, producing truly transparent limiting. FabFilter Pro-L 2 uses up to 4 ms of lookahead. iZotope Ozone Maximizer uses algorithm-based limiting that effectively anticipates peaks.

Slower attack times on a limiter can allow transient peaks to pass through momentarily before the gain reduction kicks in β€” this can add punch and impact to a master, but risks overshooting the ceiling if not carefully managed. Many experienced engineers use this technique deliberately: setting a slightly slower attack on a limiter to let kick drum transients breathe, accepting a tiny amount of overshoot that the true peak limiter stage then catches.

Release

Release time determines how quickly the limiter stops applying gain reduction after the signal drops back below the threshold. Too fast a release causes the gain to snap back abruptly, introducing distortion and an unnatural pumping effect. Too slow a release causes the gain reduction to linger, suppressing the audio level well after the peak has passed and reducing average loudness.

Most modern limiters handle release automatically using programme-dependent release β€” the algorithm adjusts the release time based on the content, applying a slower release for sustained material and a faster release for transient-heavy content. This is generally the correct setting for mastering use. Manual release adjustment is more useful when using a limiter on individual tracks in a mix.

Gain Reduction Meter

The gain reduction meter is arguably the most important visual indicator when using a limiter. It shows how much volume reduction the limiter is applying at any given moment.

If your limiter shows 3 dB of gain reduction on the loudest transients, it is pulling those peaks down by 3 dB to keep them below the ceiling. If it is showing consistent gain reduction of 6–8 dB or more, the signal coming into the limiter is too hot β€” either the mix needs to be turned down, or dynamics processing earlier in the chain needs to do more work before the limiter sees the signal.

As a general guideline: 1–3 dB of peak gain reduction is a well-controlled master. 4–6 dB is moderate and still acceptable for louder genres. Beyond 6 dB of consistent gain reduction, you are almost certainly degrading the sound quality of your master, and it will likely sound worse than a quieter, more dynamic version of the same mix.

True Peak Mode

Many modern limiters offer a dedicated true peak mode, which enables oversampled peak detection to catch inter-sample peaks that a standard sample-domain peak meter would miss. For streaming delivery, this mode must be enabled. The mechanics of why are explained in the next section.

Dithering

Some mastering limiters include an integrated dithering stage. Dithering is the process of adding low-level noise to a signal when reducing bit depth β€” from 32-bit float in your DAW to 24-bit or 16-bit for delivery β€” to prevent quantisation distortion. If your limiter offers dithering and it is the last plugin in your mastering chain, enable it when exporting to 16-bit (for CD or certain streaming deliveries). For 24-bit exports, dithering is generally not necessary, though opinions vary among engineers.

True Peak Limiting: Why -1.0 dBTP Matters

True peak limiting is one of the most misunderstood concepts in modern mastering, yet it has direct, practical consequences for how your music sounds on streaming platforms and in consumer playback systems.

The Problem: Inter-Sample Peaks

Digital audio is made up of discrete samples β€” individual measurements of the audio waveform taken at the sample rate (e.g. 44,100 times per second for 44.1 kHz audio). A standard peak meter in your DAW reads the level of each sample. But the actual audio waveform that gets reconstructed during playback β€” when the DAC converts the digital signal back to analogue β€” does not always follow the exact path implied by those samples.

When the DAC reconstructs the continuous analogue waveform from the discrete digital samples, the interpolated curve between samples can actually peak higher than any of the individual samples themselves. These are inter-sample peaks (ISPs). A standard peak meter will not show them. A standard peak-reading limiter will not catch them. But they can β€” and do β€” cause clipping in downstream processing, streaming encoders (MP3, AAC, Ogg Vorbis), and consumer DACs.

This is why you will see small amounts of distortion on streaming platforms even on masters that appear to peak at exactly 0 dBFS β€” the inter-sample peaks are exceeding 0 dBFS after encoding, even though the digital file looks clean.

The Solution: True Peak Meters and True Peak Limiters

A true peak meter uses oversampling β€” typically 4x or 8x β€” to upsample the audio and calculate what the reconstructed analogue waveform would actually look like. This reveals the inter-sample peaks that exist between samples. A true peak limiter then applies gain reduction to catch these peaks before they can cause downstream clipping.

The standard recommendation for streaming delivery is a true peak ceiling of -1.0 dBTP. This provides 1 dB of safety margin for inter-sample peaks and ensures that after encoding to lossy formats (which can raise peak levels slightly), the resulting audio stays below 0 dBFS in playback.

Some engineers use -0.5 dBTP, particularly for content that will be encoded to high-quality AAC. Some use -2.0 dBTP for extra safety when delivering to broadcast. The AES (Audio Engineering Society) recommends a maximum true peak level of -1.0 dBTP for streaming delivery content, and this is supported by Spotify, Apple Music, YouTube Music, and most other major platforms in their delivery specifications.

Practical Rule: Always enable true peak mode on your mastering limiter before exporting. Set the ceiling to -1.0 dBTP. Verify the true peak of your exported file using a dedicated loudness meter (such as the free Youlean Loudness Meter, or the metering built into FabFilter Pro-L 2 or iZotope Ozone) before submitting to any distribution platform. A file that reads -0.3 dBFS on a standard meter may actually contain inter-sample peaks of +0.5 dBTP β€” a level that will cause clipping in streaming encoders.

True Peak in Lossy Encoding

The problem of inter-sample peaks is compounded significantly by lossy encoding. When a streaming platform takes your 24-bit WAV file and encodes it to AAC 256 kbps (as Apple Music does) or Ogg Vorbis 320 kbps (as Spotify does), the encoding process itself can raise the peak level of the audio. This is a well-documented phenomenon β€” lossy codecs are not perfectly level-preserving, and the reconstructed audio can exceed the peak level of the original file by 0.5–2 dB in some cases.

This is the primary reason the -1.0 dBTP recommendation exists for streaming delivery, not just the inter-sample peak phenomenon alone. Leaving 1 dB of true peak headroom before encoding gives the codec room to operate without pushing the reconstructed audio into clipping.

Loudness Targets for Streaming and Mastering

One of the most important developments in mastering over the last decade has been loudness normalisation β€” the process by which streaming platforms automatically adjust the playback level of tracks to a target loudness, measured in LUFS (Loudness Units relative to Full Scale).

What Is LUFS?

LUFS is a loudness measurement standard defined by the ITU-R BS.1770 specification. Unlike a simple peak meter, LUFS measures perceived loudness β€” it weights different frequencies according to how the human ear perceives them, and it integrates loudness over time rather than reacting to instantaneous peaks. This makes it a far more accurate representation of how loud a track actually sounds to a listener.

There are three key LUFS measurements to understand:

  • Integrated LUFS: The average loudness across the entire track. This is the number streaming platforms use for normalisation.
  • Short-term LUFS: Loudness averaged over a 3-second window. Useful for monitoring specific sections of a track.
  • Momentary LUFS: Loudness averaged over a 400 ms window. Useful for real-time monitoring during mixing.

Platform Loudness Normalisation Targets

Every major streaming platform applies loudness normalisation β€” they measure the integrated LUFS of your track and adjust playback volume so it sits at their target level. If your track is louder than their target, they turn it down. If it is quieter, they turn it up (on most platforms).

Here are the current normalisation targets as of May 2026:

  • Spotify: -14 LUFS integrated (with a -1.0 dBTP true peak limit post-encoding)
  • Apple Music: -16 LUFS integrated (Sound Check at -16 LUFS)
  • YouTube / YouTube Music: -14 LUFS integrated
  • Tidal: -14 LUFS integrated
  • Amazon Music: -14 LUFS integrated
  • Deezer: -14 LUFS integrated (PLOUD standard)
  • SoundCloud: -14 LUFS integrated
  • CD (Red Book): No normalisation β€” typical commercial masters range from -9 to -12 LUFS integrated
  • Broadcast (EBU R128): -23 LUFS integrated, -1.0 dBTP true peak maximum

Why Chasing Loudness Hurts Your Music

The critical implication of loudness normalisation is this: if you submit a track that is mastered to -8 LUFS, Spotify will turn it down by 6 LUFS to hit its -14 LUFS target. You will be no louder than a track mastered to -14 LUFS β€” but your track will have been severely over-limited to achieve that -8 LUFS in the first place, destroying transients and dynamic range in the process.

A track mastered to -14 LUFS with 2 dB of peak limiting will almost always sound better on Spotify than the same track crushed to -8 LUFS β€” because when both are played back at equivalent loudness, the -14 LUFS version retains its punch, space, and dynamic contrast. When mastering at home, targeting platform loudness norms rather than chasing raw loudness is one of the most important decisions you can make.

Genre does affect this calculation. EDM, hip-hop, and pop often target -8 to -10 LUFS for CD masters precisely because the genre expectation is maximum loudness and energy. Even on streaming platforms, these genres typically sit at -9 to -11 LUFS before normalisation kicks in. But for most other genres β€” jazz, classical, singer-songwriter, ambient β€” -14 LUFS or quieter is appropriate and will sound significantly better through normalisation.

Practical Limiter Workflow: Step-by-Step

The following workflow applies to mastering β€” placing a limiter as the final stage of a master bus chain. Variations for mix bus use are noted where relevant.

Step 1: Prepare the Mix Before the Limiter

A limiter cannot fix a broken mix. The quality of your master is determined primarily by the quality of the mix entering the limiter. Before you touch the limiter, verify the following:

  • The mix peaks at around -6 dBFS on a standard peak meter. This gives the mastering chain sufficient headroom to work.
  • There are no rogue transients β€” single hits that spike 10+ dB above the rest of the mix. Identify and address these in the mix or with a clip-based gain correction before mastering.
  • The low end is controlled β€” excessive sub-bass energy is the most common cause of over-limiting, because bass peaks eat up headroom before they can be heard.
  • EQ and compression have been applied as needed. A well-controlled mix with modest dynamic range reaches a limiter that needs to do very little β€” which is the goal.

Understanding headroom in mixing is fundamental here. If you are gaining your tracks too hot and running your mix bus hot, you will arrive at the mastering stage with almost no room to work, and the limiter will have to do far too much.

Step 2: Set the Ceiling

Set your output ceiling to -1.0 dBTP with true peak mode enabled. This is non-negotiable for streaming delivery. Do not set it to 0 dBFS β€” you will produce inter-sample peaks that exceed 0 dBFS after encoding. The ceiling stays here for the entire session.

Step 3: Set Input Gain (Threshold) to Zero

Start with 0 dB of input gain. Observe what the integrated LUFS meter reads. This is your starting point. If your mix is well-prepared, it should read somewhere between -18 LUFS and -22 LUFS at 0 dB input gain.

Step 4: Raise Input Gain Gradually

Raise the input gain slowly β€” in 1 dB increments β€” while watching two things simultaneously: the gain reduction meter on the limiter and the integrated LUFS reading on your loudness meter. Stop raising input gain when any of the following conditions are met:

  • The gain reduction meter shows more than 3–4 dB of reduction on peaks (for transparency-critical masters).
  • You can audibly hear the limiter working β€” pumping, distortion, or the transients sound dulled and lifeless.
  • The integrated LUFS reading reaches your target (-14 LUFS for most streaming, -16 LUFS for Apple Music, -9 to -12 LUFS for CD).

Step 5: A/B Test the Limited vs Unlimited Version

This is the step most producers skip β€” and it is arguably the most important. Bypass the limiter (or set input gain to 0) and listen to the same passage. Then engage the limiter. Volume-match them by ear or by meter. Does the limited version sound better, the same, or worse? You are listening specifically for:

  • Whether the kick drum still has punch and impact.
  • Whether the stereo image feels wider or narrower.
  • Whether the high frequencies feel dull or harsh.
  • Whether the bass feels controlled or wobbly and inconsistent.
  • Whether the vocal sits naturally or feels pushed-forward and fatiguing.

If the limited version sounds worse on any of these dimensions at equal loudness, you are over-limiting. Pull back the input gain until the difference is either positive or negligible.

Step 6: Check Gain Reduction on the Loudest Section

Navigate to the loudest section of your track β€” typically a drop, chorus, or the densest arrangement moment. This is where the limiter will work hardest. Check the gain reduction here specifically. If the limiter is showing 8+ dB of reduction in the chorus when it was showing 2 dB in the verse, the track has extreme dynamic contrast that may need addressing with upstream compression or arrangement decisions, not more limiting.

Step 7: Export and Verify with a Loudness Meter

Export the file at 24-bit WAV or higher. Open the exported file in a standalone loudness meter β€” Youlean Loudness Meter (free) or the metering in your mastering software β€” and verify both the integrated LUFS and the true peak readings. The true peak reading should not exceed -1.0 dBTP. If it does, return to the session, lower the ceiling slightly, and re-export.

Limiter Plugin Recommendations

The limiter plugin market is mature and well-developed. Several tools stand out as industry standards, and the differences between them matter at professional loudness levels.

FabFilter Pro-L 2

FabFilter Pro-L 2 is the most widely recommended mastering limiter among professional engineers as of 2026, and for good reason. It offers eight different limiting algorithms ranging from transparent (ideal for classical and jazz) to aggressive (ideal for EDM and hip-hop), a dedicated true peak ceiling with oversampling up to 32x, a full integrated loudness display in LUFS directly on the plugin interface, and exceptional metering that shows gain reduction, output level, and true peak simultaneously.

The Transparent mode is genuinely transparent at moderate limiting levels β€” it is the best general-purpose algorithm for unknown or mixed genre content. The Aggressive and Extreme modes introduce saturation-style harmonic distortion that can add perceived loudness without additional gain reduction β€” useful for genres where density is a goal. The current price is approximately $199 USD direct from FabFilter.

iZotope Ozone Maximizer

The Maximizer module in iZotope Ozone uses a different algorithmic approach β€” IRC (Intelligent Release Control) algorithms in four variants (IRC I through IRC IV) that use predictive processing to reduce inter-sample overshoots and apply gain reduction in a musically intelligent way. IRC IV is particularly effective for transparent limiting of complex programme material. Ozone also includes an integrated Codec Preview mode that shows you how the audio will sound after MP3 or AAC encoding β€” an enormously useful feature for verifying streaming delivery quality. Ozone is available as part of the iZotope Ozone suite, with the standard edition priced at $249 USD.

Sonnox Oxford Limiter v3

The Sonnox Oxford Limiter is a long-standing professional tool with an Enhance function that adds low-level saturation to increase perceived loudness without additional peak limiting. It is particularly valued for broadcast work and for content where a warm, slightly coloured limiting character is desired. The Enhance parameter is subtle but effective β€” it adds odd-order harmonic content at low levels that makes the mix feel fuller without obvious distortion.

Waves L2 Ultramaximizer

The Waves L2 is one of the most historically significant limiters in digital audio β€” the hardware L2 unit was the standard mastering limiter for major label releases throughout the late 1990s and 2000s. The plugin version remains widely used, particularly in mixing contexts. It is less sophisticated than Pro-L 2 or Ozone in terms of algorithm options, but its character is well-understood and many engineers appreciate its predictable, musical gain reduction behaviour. It also includes an integrated dithering stage.

Stock DAW Limiters

Both Ableton Live and Logic Pro include functional stock limiters. Logic Pro's Limiter and Adaptive Limiter are capable tools for mixing contexts and rough mastering passes. Ableton Live's Limiter is basic but effective for peak control in a mix. Neither offers true peak detection in standard mode, making them less suitable as the sole mastering limiter for streaming delivery β€” supplement them with a dedicated LUFS metering plugin if using them at the master stage.

Free and Budget Options

For producers working on a tight budget, the following free or low-cost limiters are worth knowing:

  • Limiter No6 by VladG Sound: A free multi-stage limiter with true peak detection and excellent metering β€” arguably the best free mastering limiter available.
  • Tokyo Dawn Records TDR Limiter 6 GE: A paid upgrade to Limiter No6 with additional algorithms and features β€” approximately $60 USD.
  • Voxengo Elephant: A professional-grade limiter with a long track record in the mastering community β€” approximately $99 USD.

For a broader look at dynamics tools, the best compressor plugins guide covers the full landscape of compression and limiting tools at every price point.

Advanced Limiting Techniques

Clipping Before the Limiter

One technique used by professional mastering engineers, particularly for high-energy electronic and hip-hop music, is soft clipping before the limiter. A soft clipper (such as Sonnox Inflator, Fabfilter Saturn, or a dedicated clipper plugin like Newfangled Audio Saturate) is placed before the mastering limiter. The clipper gently rounds off the very sharpest transients β€” primarily kick drum and snare peaks β€” reducing the peak-to-loudness ratio of the mix before it reaches the limiter.

Because transient peaks are reduced before the limiter, the limiter needs to do less work to achieve the same integrated LUFS. The result is often a louder master with less audible limiting artefacts β€” because the total gain reduction required is spread between the clipper and the limiter rather than being handled entirely by the limiter.

This technique requires care: too much clipping introduces harmonic distortion that degrades high frequencies and can sound harsh. The sweet spot is usually a few dB of clipping on the very highest peaks, leaving the body of the mix untouched.

Multiband Limiting

Some mastering engineers use a multiband limiter or a combination of multiband compression followed by a broadband limiter. The advantage of multiband limiting is that low-frequency peaks β€” which typically drive the most aggressive broadband gain reduction β€” can be handled independently, allowing the rest of the frequency spectrum to pass through with minimal limiting.

For example, a peak in the 60–120 Hz range from a kick drum or bass note might be causing 4 dB of broadband gain reduction every time it hits, which is also suppressing the mid-range and high-frequency content of the mix. A multiband limiter can catch that low-end peak independently, reducing its level without affecting the rest of the spectrum. The result is often a louder, more consistent master with better frequency balance.

The trade-off is that multiband processing introduces phase issues at crossover points and can make the frequency balance feel artificial if pushed too hard. It is a tool for experienced engineers who understand its limitations. A good starting point is the multiband compression guide, which covers the principles that also apply to multiband limiting.

Parallel Limiting

Parallel limiting β€” blending a limited version of the signal with the unlimited original β€” is less common than parallel compression but can be effective for very transient-heavy material like orchestral recordings or acoustic music. The technique preserves the peak transient character of the unlimited signal while bringing up the overall average loudness of the limited version. The blend ratio determines how much transient character is preserved versus how loud the result is.

Using a Limiter on the Mix Bus (Not Just Mastering)

While most discussion of limiters centres on mastering, a limiter on the mix bus during mixing has specific uses. Placing a limiter on the mix bus with its ceiling set to -0.3 dBFS or -1.0 dBFS β€” at 0 dB of input gain, so it is catching only the occasional peak β€” can prevent the mix bus from clipping during especially loud moments without affecting the overall mix dynamics. This is different from using a limiter as a loudness maximiser β€” it is purely protective.

A limiter on individual tracks is useful for:

  • Drum bus: Catching the occasional rogue hit that is significantly louder than the rest without changing the character of the drum sound.
  • Vocal track: Tightening unexpected surges in level from an unpredictable performance, especially in live recording situations.
  • Bass: Preventing individual bass notes from spiking 6–8 dB above the average bass level, which would push the mix bus compressor into heavy gain reduction on every note.

When limiting individual mix tracks, character and colour are less of a concern than on the master. You can use more aggressive limiting, faster attack times, and even embrace some colouration as a creative choice. Mixing drums effectively often involves a limiter on the drum bus for exactly this reason β€” controlling the peaks before they reach the mix bus compressor.

Stem Limiting

Stem mastering β€” mastering using grouped stems (drums, bass, instruments, vocals) rather than a single stereo mix β€” allows the mastering engineer to apply a limiter (and other processing) to individual stems before summing them to the final master. This approach can produce significantly more headroom-efficient masters because the limiting can be applied where it is needed most β€” on the drum stem, for example β€” without affecting stems that do not need heavy limiting.

Limiting for DJ and Club Use

Masters intended for DJ use in club systems often follow different conventions than streaming masters. Many DJs and club sound systems do not apply loudness normalisation, and in a DJ context, louder tracks can have a practical advantage in live performance. For these contexts, some engineers master to -9 or -10 LUFS with more aggressive limiting and a ceiling at -0.3 dBFS, accepting more limiting artefacts in exchange for louder playback on systems where normalisation does not apply.

Checking Your Master Before Submission

Before submitting any master to a distribution platform, verify the following with a dedicated loudness meter:

  • Integrated LUFS (full track) β€” confirm it is near your target, not wildly different from what your DAW showed during the session.
  • True peak maximum β€” must not exceed -1.0 dBTP for streaming delivery.
  • Dynamic range (LRA) β€” most platforms report this and it is a useful quality indicator. A healthy pop master typically shows LRA of 5–9 LU. Classical and jazz should be higher. An LRA below 3 LU indicates over-limiting.

Several distribution platforms provide post-upload loudness reports β€” DistroKid, TuneCore, and CD Baby all show the measured LUFS of your uploaded masters. Use these as a feedback loop to calibrate your workflow over time. If you are distributing music, understanding the platform you are working with is also important β€” the DistroKid review covers how the platform handles your audio files from upload to streaming delivery.

Common Mistakes and How to Avoid Them

The following are the most common limiter mistakes made by producers at every level:

  • Setting the ceiling to 0 dBFS instead of -1.0 dBTP: Without true peak mode, your master will contain inter-sample peaks that exceed 0 dBFS after streaming encoding. Always use -1.0 dBTP with true peak mode enabled.
  • Using too much input gain: More than 4–6 dB of consistent gain reduction typically degrades sound quality. If your meter is showing 8 dB of reduction, pull back and fix the mix first.
  • Not A/B testing at equal loudness: Louder always sounds better in the moment β€” the human ear perceives louder as better, regardless of quality. Always volume-match when comparing limited and unlimited versions.
  • Forgetting to check the exported file: What the limiter shows during the session may not perfectly match the exported file. Always verify the exported WAV with an external loudness meter.
  • Treating the limiter as the solution to a bad mix: A limiter cannot fix frequency imbalance, phase problems, clashing elements, or a weak arrangement. These must be addressed in the mix, not by compressing dynamics further at the master stage.
  • Ignoring genre context: A -14 LUFS master for a commercial EDM track and a -14 LUFS master for an acoustic folk record require very different approaches to achieve. The LUFS target is the same; the journey to get there is entirely different.

Practical Exercises

Beginner Exercise

Set Up and Monitor a Limiter on Your Master Bus

Place a limiter on your master bus and set the ceiling to -1.0 dBTP with true peak mode enabled. Starting with 0 dB of input gain, raise the input gain in 1 dB steps while watching the gain reduction meter and integrated LUFS display. Stop when you reach -14 LUFS integrated and note how much gain reduction the limiter is applying at the loudest section of your track β€” this number tells you how hard your mix is working the limiter.

Intermediate Exercise

Compare Loudness Targets Across Three Masters of the Same Mix

Export three versions of the same mix using your mastering limiter: one at -9 LUFS, one at -14 LUFS, and one at -18 LUFS. Import all three into your DAW and volume-match them so they play at equal perceived loudness using a LUFS meter. Listen critically to the transient response, stereo width, and frequency balance of each version β€” this exercise makes the trade-off between loudness and quality immediately audible and helps you find the point of diminishing returns for your specific mix.

Advanced Exercise

Soft Clip Before the Limiter and Measure the Difference

On a dense mix (electronic or hip-hop), insert a soft clipper plugin before your mastering limiter and adjust the clipper to reduce transient peaks by 2–3 dB before the signal reaches the limiter. Export a version with only the limiter, and a version with the clipper plus the limiter at the same integrated LUFS target. Use a loudness meter and spectrum analyser to compare true peak, LRA (loudness range), and high-frequency content between both versions β€” and listen critically at equal volume to evaluate whether the clipper-assisted master retains more transient punch and detail.

Frequently Asked Questions

FAQ What does a limiter do?
A limiter is a dynamics processor that prevents a signal from exceeding a set ceiling level. It works like an extreme compressor with an infinite ratio β€” any signal that tries to go above the threshold is caught and brought down immediately, making it ideal for controlling peaks in mixing and maximising loudness in mastering.
FAQ What is the difference between a limiter and a compressor?
A compressor reduces dynamic range with a specific ratio (2:1, 4:1, 8:1) and is often used creatively to shape tone and punch. A limiter is essentially a compressor with an infinite ratio, meaning no signal can exceed the ceiling β€” its job is to be transparent and catch peaks rather than colour the sound.
FAQ What should I set my limiter ceiling to for streaming?
For streaming platforms, set your true peak ceiling to -1.0 dBTP with true peak mode enabled. Most major platforms (Spotify, Apple Music, Tidal) apply loudness normalisation at -14 LUFS or -16 LUFS, so extreme limiting to get loud does not help β€” the platform will turn you down anyway, and you will have degraded your transients for nothing.
FAQ What is true peak limiting?
True peak limiting accounts for inter-sample peaks β€” spikes that occur between digital samples when audio is converted from digital to analogue. A standard peak meter will not show these spikes, but they can cause clipping in playback systems and streaming encoders. A true peak limiter uses oversampling (typically 4x or 8x) to detect and catch these inter-sample peaks before export.
FAQ Should I use a limiter on individual tracks or just the master?
Limiters are most commonly placed on the master bus as the final stage before export. However, limiters on individual tracks are useful for controlling wild peaks on drums, transient-heavy percussion, or unpredictable sources like live vocals β€” a limiter on a drum bus, for example, can tighten peaks before they reach the mix bus compressor.
FAQ What is gain reduction in a limiter?
Gain reduction is the amount of volume reduction the limiter is applying at any given moment, displayed on the gain reduction meter. If your limiter shows 3 dB of gain reduction on the loudest transients, it is pulling those peaks down by 3 dB to keep them below the ceiling β€” more than 4–6 dB of consistent gain reduction typically indicates you need to lower the input level or reduce dynamics in the mix before limiting.
FAQ What LUFS should my master be?
Target LUFS depends on your platform: Spotify normalises to -14 LUFS integrated, Apple Music to -16 LUFS, YouTube to -14 LUFS, and CD mastering typically targets -9 to -12 LUFS. Rather than chasing a loudness number, prioritise the quality of your mix β€” a dynamic, clean master at -14 LUFS sounds significantly better than an over-limited master crushed to -8 LUFS that gets turned down to the same level anyway.
FAQ What are the best limiter plugins?
The most widely used limiters in professional mastering are FabFilter Pro-L 2, iZotope Ozone Maximizer, Sonnox Oxford Limiter v3, and Waves L2 Ultramaximizer. For mixing bus limiting, the Waves L1 and stock limiters in Ableton Live and Logic Pro are reliable. For beginners, FabFilter Pro-L 2 offers the most informative metering and the most transparent limiting quality across the widest range of material.