Studio Utility

MIRACLE FXLOUDNESS PENALTY

ITU-R BS.1770-4 · Local Only

Drop audio file here

or click to browse — .wav · .mp3 · .flac · .aac

100% Local · No upload required

Analysing Audio...

Applying BS.1770-4 K-weighting & gating...

—
Integrated Loudness
-- LUFS
ITU-R BS.1770-4
-40-23-140
Sample Peak
-- dB
 
Streaming Platform Penalties

Negative = track will be turned DOWN · Positive = track may be turned UP · Values in dB

MIRACLE FXLOUDNESS PENALTY— Guide
Miracle FX Loudness Penalty Meter
What it doesAnalyses the integrated loudness of any audio file and calculates how streaming platforms will adjust its volume. Know before you upload — no surprises at mastering stage.
StandardITU-R BS.1770-4 — the international broadcast loudness standard used by Spotify, Apple Music, YouTube, and all major platforms. Implemented in full: K-weighted filter chain + dual-gated LUFS measurement.
Privacy100% local processing. Your audio never leaves your device. No upload, no server, no tracking.
danmiracle.bandcamp.com — Built by Dan Miracle, 30 years of D&B and jungle production.
Created by Daniel Jobbins · Miracle FX is a trading name of DNJ Digital Ltd
How to Use
Loading a File
Drop / ClickDrag an audio file onto the drop zone, or click it to browse. Accepts WAV, MP3, FLAC, AAC, and most browser-decodable formats.
Reading the Results
Integrated LoudnessThe overall perceived loudness of the track in LUFS (Loudness Units relative to Full Scale). Lower number = quieter. Streaming platforms target between −14 and −16 LUFS.
Sample PeakThe highest individual sample amplitude. Values above 0 dB indicate clipping. Above −0.3 dB triggers a near-clipping warning — leave at least 0.5 dB of headroom before mastering.
Penalty ValuesEach platform card shows the gain adjustment the platform will apply. Negative = your track is louder than target, platform turns it down. Positive = quieter than target, platform may turn it up.
Status Colours
GreenTrack is within ±0.5 dB of the platform target. Passes normalisation cleanly.
AmberTrack will be turned down. Loud master — not a problem for club records, but may impact perceived volume in playlists.
Platform Loudness Targets
Streaming
Spotify−14 LUFS integrated. Uses ReplayGain 2.0 algorithm. Loudness normalisation is on by default across all tiers.
YouTube−14 LUFS. Normalises both music and video content. Content below target may be boosted, adding noise floor.
Apple Music−16 LUFS (Sound Check). Legacy mode targets −14 LUFS. Most modern Apple devices use the stricter −16 LUFS target.
Tidal / Amazon−14 LUFS. Both use BS.1770-based normalisation. Tidal HiFi and Atmos content follows the same target.
Deezer−15 LUFS. Mid-point target, slightly louder than Apple's preference.
Pandora−15 LUFS. Applied to all streams regardless of subscription tier.
D&B / Club Context
Mastering loudDrum & Bass and club records are often mastered at −6 to −9 LUFS for physical formats and DJ use. On streaming, expect 5–8 dB of gain reduction. The dynamic impact is preserved — the platform simply turns it down uniformly.