MixMasterAIWhat Is LUFS? Loudness in Music Explained Simply
LUFS is the standard measure of loudness used by every streaming platform. Understanding it changes how you approach mastering.
What LUFS Means
LUFS stands for Loudness Units Full Scale. It is a standardized unit for measuring the perceived loudness of audio over time, developed by the International Telecommunication Union as part of the ITU-R BS.1770 standard. Unlike peak meters that measure instantaneous amplitude, LUFS integrates loudness across the full duration of a track to reflect how loud something actually sounds to the human ear rather than how loud its peaks are.
Why Streaming Platforms Use LUFS
Before loudness normalization, the music industry was locked in a loudness war. Labels mastered tracks progressively louder to sound more prominent in playlists, at the expense of dynamic range and audio quality. Streaming platforms solved this by measuring every upload in LUFS and adjusting playback volume to a consistent target. If your master is at the target, it plays back untouched. If it is louder, the platform turns it down.
Streaming Platform LUFS Targets
Each major platform normalizes to a different integrated loudness level. Spotify targets -14 LUFS. Apple Music targets -16 LUFS. YouTube targets -14 LUFS. SoundCloud targets -9 LUFS (the loudest of any platform). TikTok targets -13 LUFS. Amazon Music targets -14 LUFS. Tidal targets -14 LUFS. Mastering to the exact target for your primary platform ensures your track plays back with no volume adjustment applied.
What Happens When Your Master Is Too Loud or Too Quiet
If your integrated loudness is above the platform target, the platform applies a gain reduction at playback. Your loudness-war master actually ends up at the same volume as everything else, but with reduced dynamic range and squashed transients from the heavy limiting. If your master is too quiet, the platform boosts it, which can expose noise floor and reduce punch. The optimal strategy is mastering to match the target exactly.
How to Hit the Right LUFS
Hitting the right LUFS requires measuring integrated loudness with a compliant meter (not a peak meter), applying compression to reduce dynamic range, and using a brick-wall limiter to bring the integrated loudness to target without transient clipping. MixMasterAI handles all of this automatically. Select your streaming platform and the processing pipeline normalizes your master to the exact LUFS target with a true peak ceiling at -1 dBTP.
FAQ
Common questions
What is the difference between LUFS and dB?
dB (decibels) measures signal level at a specific instant, either as peak amplitude or RMS average. LUFS measures integrated loudness over time using a perceptual weighting model that reflects how humans hear. A track can have a high peak dB but a low integrated LUFS if it has a lot of quiet sections. LUFS is a better predictor of how loud something feels to a listener than peak dB.
Should I master to -14 LUFS for all streaming platforms?
Master to the LUFS target of your primary release platform. If you are releasing primarily to Spotify, master to -14 LUFS. If Apple Music is your primary platform, -16 LUFS. For SoundCloud, -9 LUFS. If you are releasing to multiple platforms simultaneously, -14 LUFS is a safe universal target that works on Spotify, YouTube, Amazon, and Tidal without the platform making significant volume adjustments.
What is true peak and why does it matter for streaming?
True peak measures the actual peak level of audio after digital to analog conversion, including inter-sample peaks that occur between sample points. Streaming platforms re-encode audio using lossy codecs that can boost inter-sample peaks during conversion. Setting a true peak ceiling at -1 dBTP in your master ensures that the codec-boosted version stays below 0 dBFS and does not clip or distort in the final delivery.
How do I measure LUFS in my DAW?
Most modern DAWs include a loudness meter plugin. Cubase, Logic Pro, and Ableton Live all have built-in LUFS measurement. For other DAWs, free options include Youlean Loudness Meter, klanghelm VUMT, and MeterPlugs LUFS Meter. The integrated LUFS reading is the relevant measurement for streaming targets. Short-term and momentary LUFS readings are less important for platform compliance.
Put it into practice.
Now you know the theory. MixMasterAI applies it automatically. Upload your track and hear the difference in 60 seconds.
Master to the Right LUFS. Free.Free forever. No account. No watermark.