How Loud Should Your Master Be? LUFS Explained by a Mastering Engineer

The short answer

As a mastering engineer, the question I hear most is how loud a master should be. There is no single right loudness for a master. Streaming platforms normalize playback, so chasing one LUFS target doesn't make a track sound better or louder to the listener. The right level depends on the genre, the arrangement, the dynamics of the mix and where the track will be played: streaming, a club system or vinyl. That's why every master needs its own mastering decisions, and why two great masters can sit at very different loudness levels.

What LUFS means

LUFS (Loudness Units relative to Full Scale) measures perceived loudness over time, closer to how we actually hear than a simple peak meter. Integrated LUFS is the average across the whole track, and it's the number streaming platforms use for loudness normalization. Short term LUFS shows the loudness of the last few seconds, which tells you much more about how a drop or a chorus really hits. True peak, measured in dBTP, shows how high the waveform goes between samples, which matters once the master is converted to lossy streaming formats.

What the streaming platforms do

If your master is louder than a platform's normalization level, the platform turns it down. If it's quieter, it may turn it up or leave it as it is.

Those numbers are where the platforms play your track, not targets you have to master to. A dense club track delivered louder simply gets turned down. A dynamic acoustic track delivered quieter may play exactly as it was mastered. What survives normalization is the character of the master: its punch, clarity, tonal balance and dynamic range.

Why every track needs a different treatment

Here's how different the mastering decisions can be, track by track, even when the goal is always a release ready master:

• A peak time techno track. A steady four to the floor kick, a rolling bassline and very little variation in energy. This kind of track can usually carry more loudness, but only if the kick transient survives the limiter and the sub bass stays controlled and mono. If the limiter starts eating the kick, the track loses the punch that makes it work on a club system. Techno mastering is often about how much level the kick can take.
• A melodic techno track with long breakdowns. The breakdown is meant to be quieter than the drop. If you push the whole track to one loudness, the breakdown gets louder and the drop loses impact. Here the integrated LUFS reading is lower simply because of the arrangement, and the short term loudness at the drop is what really matters.
• A hip hop track driven by vocals and 808. The vocal has to sit forward and the 808 has to feel big without masking the kick. Heavy limiting flattens the vocal's transients and blurs the low end, so the balance between 808, kick and vocal decides how far the master can go. When that balance isn't right in the stereo mix, stem mastering gives more control over it.
• A pop ballad. The emotion comes from the dynamics: a soft verse and a chorus that opens up. Squeezing it with compression and limiting to match a club record removes exactly what makes it move. Normalization will bring it to a similar playback level anyway.
• An ambient or downtempo piece. Space, reverb tails and quiet details are the whole point. A gentle master with plenty of dynamic range serves it far better than a loud one.
• The same track on vinyl. A vinyl master follows physical limits: mono low end, controlled sibilance and high frequencies, and a level that depends on the side length. It's a different master from the streaming version, even for the same song. More on mastering for vinyl.

How good loudness is made in mastering

Clean loudness starts in the mix: a controlled low end, a kick and bass that don't fight, enough headroom for the mastering stage, and no single element that the limiter has to grab. In the mastering chain, level is best built in stages, with EQ, gentle compression, saturation or clipping where it suits the sound, and a limiter that only does the last part of the work. Checking the master at streaming level, against reference tracks in the same genre and against other masters in the same release, shows whether it still sounds full after normalization. Watching true peak keeps the lossy streaming versions free from distortion.

The conclusion

The question isn't "what LUFS should my master be?" but "what does this track need?" Genre, arrangement, the mix, and the places it will be played all change the answer. That's why I treat every master individually, listen to how it translates on club systems, headphones and laptop speakers, and set the loudness where the track sounds its best, not where a number says it should be. If you're unsure about your own master, send it over.

Sources

Spotify's figures come from its own documentation: tracks are normalized to -14 LUFS integrated (ITU 1770), Premium listeners can switch to Loud (-11 LUFS) or Quiet (-19 LUFS), and Spotify recommends keeping true peaks below -1 dBTP, or below -2 dBTP if your master is louder than -14 LUFS. See Spotify for Artists: Loudness normalization. Apple Music and YouTube don't publish an official level in the same way, so the figures above for them are commonly measured values, which is why they say "about".