Why −14 LUFS is not a target
The average top-charting song is mastered way louder than −14 LUFS — our analysis of charting masters routinely finds integrated loudness between −6 and −11 LUFS. Either every professional mastering engineer is making the same mistake, or −14 isn't the target you've been told it is.
Here's what's really happening: −14 LUFS is Spotify's playback level, not a mastering instruction. Master louder and Spotify simply turns the volume down — your density, punch, and saturation survive the turndown. Master quieter and your track can get turned up, but only as far as its headroom allows, and in the Loud listening mode a limiter you didn't choose gets applied to your work.
That's the real reason pros master loud: when your song is louder than the target, the only thing streaming services can touch is the volume knob. The dynamics stay yours.
The rule that actually matters: the best streaming level isn't the loudest master, and it isn't −14 LUFS. It's the loudest your song can be while keeping its clarity, impact, and emotion intact.
How loudness is actually measured (and why it matters)
It hears like you do. LUFS isn't a raw power measurement like RMS — it's filtered to match human hearing (the "K-weighting" in the BS.1770 standard). Treble energy counts extra, because our ears are sensitive there — so you can't cheat the meter by hyping highs. Deep sub energy is discounted, so bass-heavy genres aren't unfairly penalized the way they were in the RMS era.
It only counts your loud parts. The standard gates out silence and everything more than 10 loudness units below your initial level. Translation: your integrated LUFS is driven by your choruses, not your quiet intros. A very dynamic song — big choruses, soft verses — measures louder than it feels, gets turned down accordingly, and can end up feeling quieter than a more controlled master on the same playlist. Counterintuitive, but it's in the math.
Three numbers, one that counts. Momentary loudness is a 400 ms window, short-term is 3 seconds — but when platforms normalize, they use integrated loudness: the gated average of your whole song. When this tool gives you a verdict, that's the number doing the work.
True peak is the silent killer. Your DAW can say 0.0 dBFS while the actual reconstructed waveform — the one your converter has to play — swings past zero between samples. Those inter-sample peaks clip cheap converters and, worse, distort when platforms encode your upload to lossy formats. That's why the standard measures peaks at 4x oversampling, and why platforms ask for −1 dBTP — or −2 dBTP if your master is louder than −14 LUFS.
This tool implements ITU-R BS.1770-4 exactly — built on a measurement engine validated against the EBU's official test vectors and independently cross-checked against ffmpeg before any number reaches your screen. Built by Raytown Productions, a mixing and mastering studio.
What loud genres actually do
Loudness lives in genre context. A −14 LUFS metal master isn't "correct" — it's quiet for the genre. Commercial rock and metal masters typically land between −5 and −8 LUFS integrated: the genre is dense, distorted, and aggressive by design, and a great-sounding −5 LUFS metal master is absolutely achievable. Acoustic, jazz, and classical live far lower, on purpose. This tool tells you where your master sits relative to your genre's commercial range — not just relative to a streaming number that was never a target.
If your master falls apart before it reaches your genre's range, that's usually a mix-bus problem, not a limiter problem — fixing that is exactly what the Conquer the Master Bus course teaches.
FAQ
What is LUFS?
LUFS (Loudness Units relative to Full Scale) is the standard measurement of perceived loudness, defined by ITU-R BS.1770. Unlike RMS, it's weighted to match human hearing and gated to ignore silence. Streaming platforms use integrated LUFS to normalize playback volume.
Should I master to −14 LUFS for Spotify?
No. −14 LUFS is Spotify's playback level, not a mastering target. Louder masters are simply turned down with their density intact; commercial releases in loud genres are routinely mastered between −6 and −11 LUFS. Master for clarity, impact, and emotion — then check what each platform will do.
What is true peak and why is it different from sample peak?
Sample peak is the largest single sample value. True peak estimates the actual reconstructed waveform between samples (measured at 4x oversampling per BS.1770-4), which can exceed 0 dBFS even when samples don't. Platforms recommend staying below −1 dBTP (−2 dBTP for masters louder than −14 LUFS) to avoid distortion when your audio is encoded to lossy formats.
Why does my dynamic song sound quieter on Spotify than less dynamic songs?
Loudness gating means your integrated LUFS is calculated mostly from your loudest sections. A dynamic song measures loud (so it gets turned down to the target) but its quiet sections stay quiet — making it feel softer next to consistently dense masters playing at the same integrated loudness.
Is my audio uploaded when I use this tool?
Never. All analysis runs in your browser using the Web Audio API — the only data that ever leaves your computer is your email address if you request the PDF report. The page even works offline: load it, disconnect, and analyze.