Consistent loudness without pumping.
Brings audio to a target LUFS level to EBU R128 — using a leveler with a glue compressor and a true-peak limiter, so nothing clips and nothing breathes. With ready-made profiles for streaming services, broadcast, podcast and club.
A chain that keeps both loudness and peaks under control
The signal passes through four stages — from metering to the limiter — so the result lands on the target LUFS without overshooting a single peak.
LUFS analysis
Loudness measurement with K and C weighting and gating to EBU R128 — momentary, short, integrated and custom window modes.
Levelling
Brings the signal to the target LUFS with adjustable rates for adding and removing gain (UP/DOWN) — tuned so the programme does not pump.
Glue compressor
An optional compressor with threshold, ratio, attack and release evens out the dynamics without changing perceived loudness.
True-peak ceiling
A brickwall limiter with 4× oversampling watches inter-sample peaks, so nothing clips once the gain goes up.
Accurate metering, clean result
Measurement-grade accuracy
The metering core is verified 1:1 against the EBU R128 / pyloudnorm reference — K and C weighting, channel summing and linearity all match to tenths of a dB.
A leveler without artefacts
Gain always changes smoothly — no click on start-up, on reset or when a state is loaded. Silence does not build up gain.
True-peak certainty
Inter-sample peaks are detected and limited through 4× oversampling — the target ceiling holds even when driven hard.
In Mber, standalone and as VST3
It runs as a built-in effect in the Mber player, as a standalone application and as a VST3 plugin in a DAW — all three share the same core, so they meter and process identically.
Fader and LRA preview
Before you apply any gain you can see how the result will turn out — including the loudness range (LRA) calculated from the real output.
Free, no strings attached
The application is free and needs no registration. It is built on a tested core with hard safeguards against crashing the host.
Your target in one click
Ready-made profiles for the most common loudness targets — pick a platform and M3K Normalizer sets the target LUFS and the ceiling for you.
Streaming
Broadcast / TV
Podcast / speech
Club / DJ
What is under the bonnet
Download
Windows 10/11 (64-bit) · standalone and VST3 plugin · free · version 1.0.7
Download installer · 2.6 MBThe installer offers both the standalone application and the VST3 plugin, and you can install just one of them. The plugin goes into Program Files \ Common Files \ VST3, where every host application looks for it. Installation requires administrator rights.
The program is free (freeware/donationware) and you may use it commercially. The installer is not signed with a certificate, so Windows will show the blue SmartScreen dialog on first run — click More info and Run anyway. You can verify the file against its SHA-256 checksum. Questions and bug reports to info@m3ksound.cz.