Loudness Normalization for Independent Artists: What Spotify Does to Your Master, in Plain English
You finish a master, upload it, add it to a playlist next to a big release, and it sounds quieter. Or it sounds louder but flatter. Before you pay for another master or blame your mix engineer, it helps to understand what the streaming service is doing on playback. Spotify publishes the details in its artist help pages, and they are more practical than most forum threads.
What normalization is
Spotify says audio is delivered to it at different volume levels, so it uses loudness normalization to balance soft and loud songs for a more consistent listening experience. That applies to every playback format, including lossless. Its help page also notes that the web player and third-party devices such as TVs and speakers do not use normalization, so what you hear can vary by device.
The number to know
Spotify adjusts tracks to -14 dB LUFS, measured according to the ITU 1770 standard. ITU-R BS.1770 is the International Telecommunication Union's recommendation for measuring programme loudness, which is why you will see it referenced across broadcast and streaming.
Two details matter for artists:
- Nothing is rewritten. Spotify says it measures loudness during upload but does not process or change your audio before playback. The gain change happens while the track plays.
- Albums are treated as albums. Spotify normalizes an entire album at once so gain does not change between tracks, which keeps your quiet songs as quiet as you intended. On shuffle, or in a playlist with tracks from other releases, it adjusts each track individually.
Turned down, or turned up
If your master is louder than the target, Spotify applies negative gain to bring it down to -14 dB LUFS. Its help page says this lowers volume compared with the master and adds no extra distortion.
If your master is quieter, Spotify applies positive gain, but it considers the track's headroom and leaves 1 dB of headroom for lossy encodings. Its own example: a track at -20 dB LUFS with a true peak of -5 dBFS is only lifted to -16 dB LUFS, not all the way to -14.
Premium listeners can also choose their own level in settings: Loud at -11 dB LUFS, Normal at -14 and Quiet at -19. On the Loud setting Spotify applies a limiter to prevent clipping in soft, dynamic tracks.
Why your track might still sound quieter
Spotify's "Track not as loud as others?" page lists several reasons, and they are worth reading before you change anything:
- A dynamic track mastered to -14 dB LUFS keeps its peaks intact, while a very loud master (Spotify's example is -6 dB LUFS) is turned down. Both play at the same perceived level, but the dynamic one's peaks can feel louder in contrast.
- In a playlist or on shuffle, track-level rather than album-level normalization applies.
- Inaudible high frequencies in a mix can make the measurement overestimate loudness, because ITU 1770 does not apply a lowpass filter.
- Very loud masters with true peaks above -2 dB can distort during encoding.
Spotify's own mastering tips
- Target around -14 dB integrated LUFS.
- Keep true peak below -1 dB, which Spotify says is best for lossy formats.
- If your master is louder than -14 dB LUFS, keep true peak below -2 dB to avoid extra distortion.
- Send one high-quality stereo master per track. Spotify says it prepares both compressed and lossless versions internally.
These are guidelines, not a rule that every genre must hit the same number. Plenty of artists master louder for stylistic reasons. The point is to make that choice knowingly, with a loudness meter, rather than to chase volume that will be turned down anyway.
Why this matters for pitching
Curators and editors hear your track next to others. A master that distorts once it is encoded, or one that sounds thin after being turned down, makes a weaker first impression than the song deserves. Get the master right, then plan the pitch. For the editorial and independent routes, see Virtual Publicist's guide to Spotify playlist submission.