LUFS Meter

A plug-in to measure and adjust the loudness similar to the human perception of loudness. Compliant with EBU R 128, ATSC A/85 and more.

Provides a unique and fast way to create initial faders up mixes and to compare with reference tracks on equal loudness.

Your new mix assistant

Before crafting a mix, levelling all tracks provides a great starting point.
Save time and let the LUFS Meter do this tedious work for you.

LUFS Meter

Fast forward the video: Before and after the synchronised LUFS Meters created the faders up mix.

Compare your work with reference tracks

To achieve beautiful results it's crucial to compare your work with reference tracks. Over and over again, until you reach the sound you are looking for.

A proven strategy is to bounce/export your work to an audio file and put it into a new project. Together with some reference tracks, each one on a separate audio track. Use the solo feature of your workstation to listen to the individual tracks. Take notes about possible improvements in your own work. Go back to your original project and work on these issues.

There is one catch though. A slightly louder track sounds better to the human ear (Even without knowingly noticing that it is louder). That's why it is important that all the tracks in the comparison are equally loud. Guess what? The LUFS Meter takes care of this.

Deliver loudness calibrated content

Add the LUFS Meter to the end of your processing chain. Press 'reset'.
Play from start to finish. Choose your target loudness and press 'adjust to'. Done.

LUFS Meter Presets

Compliant with a multitude of international loudness standards

AES TD1004.1.15-10 (streaming)
AGCOM 219/09/CSP (Italy)
ARIB TR-B32 (Japan)
ATSC A/85 / PRSS / CALM Act (US)
EBU R 128 (Europe)
EBU R 128 s1 (short content, v2.0 Jan 2016)
EBU Tech Doc 3341 (EBU Mode, v3.0 Jan 2016)
EBU Tech Doc 3342 (Loudness range, v3.0 Jan 2016)
ITU-R BS.1770-4 (Oct 2015)
OP-59 (Australia)

System requirements

  • macOS 10.7 or newer
  • Windows XP or newer
  • Linux Experimental

Supported plug-in formats

  • AAX (Pro Tools 10.3.5 or higher) on macOS and Windows
  • AAX Audio Suite (Pro Tools 10.3.5 or higher) on macOS and Windows
  • Audio Unit on macOS
  • VST on macOS, Windows and Linux
  • VST3 on macOS and Windows

32 and 64 bit on all plug-in formats.

Open source at heart

The main loudness measurement algorithm developed by Klangfreund is available for free (MIT license).

Help and guidance

The LUFS Meter is equipped with an interactive help system. Move the mouse over an item and a description for it gets displayed. (Can be disabled with a click on the help text.) An extensive manual is available as well.

Interactive Help



LUFS Meter

LUFS Meter

For musicians, producers, audio professionals and videographers...

...using loudness measurement and adjustment for commercial purposes.

...using loudness measurement and adjustment on non commercial projects.


LUFS Meter

LUFS Meter

Integrated Loudness Measurement
(ITU-R BS.1770-4)

True peak measurement

Momentary Loudness
(EBU R128)

Maximum Momentary Loudness
(EBU R128 s1)

Short Term Loudness
(EBU R128)

Maximum Short Term Loudness
(EBU R128 s1)

Loudness Range
(EBU R128)

Loudness Range Freeze On Silence


LUFS Meter

LUFS Meter

Loudness history graph

Adjustable time for the loudness history graph

Fully compliant with international loudness standards

Multiple visual regions for the integrated loudness to visualize recommendations and to assist in live broadcasting

Integrated loudness difference to target when over target loudness


LUFS Meter

LUFS Meter

Loudness adjustment (manual and automatic)

Threshold for automatic adjustment

Realtime measurement adaption when adjusting loudness

Bit-accurate signal throughput if no gain is applied

Synchronisation of
multiple LUFS Meters


up to 6

Synchronisation groups



Adjustable colours


Customizable startup setting


LUFS Meter

LUFS Meter

Support for arbitrary sample rates and bit depths

Mono and stereo

Scalable interface (vector graphics)

Retina display support

Interactive help (mouse-over tooltips)

Commercial usage allowed


Buy for $49 $39

Buy for $24 $19

Try it for free

LUFS Meter Demo 2.1.2
for macOS
LUFS Meter Demo 2.1.2
for Windows
LUFS Meter Demo 2.1.2
for Linux

Time-limited to measurements shorter than one minute.
The discounted as well as the full LUFS Meter can be evaluated with the demo.

Release notes