LUVLANG.STUDIO

Free LUFS check.
See exactly what streaming will do to your master.

Drop your track. Get integrated LUFS, true peak, and loudness range — measured by the same BS.1770-4 engine streaming services use. Then we tell you what gain reduction Spotify, Apple Music, and 8 other platforms will apply at playback.

Run Free Check What gets measured

No signup. No card. Results in 60 seconds.

What you get

Loudness
Integrated LUFS
Average loudness across the full track per ITU-R BS.1770-4 — the standard streaming services use to normalize playback.
Peak Detection
True Peak (4× sinc)
Inter-sample peaks captured with 4× polyphase sinc upsampling. Catches clipping that sample peaks miss.
Dynamics
Loudness Range (LRA)
How much your master "breathes" between quiet and loud sections. Tells you if over-limiting flattened your dynamics.
Spectrum
Frequency Profile
Bass / midrange / treble balance with rolling-band analysis. Spots low-mid mud and harsh top before it kills translation.

Compared against 10 streaming targets

Spotify−14 LUFS
Apple Music−16 LUFS
Tidal−14 LUFS
YouTube Music−14 LUFS
Amazon Music HD−14 LUFS
SoundCloud−14 LUFS
Bandcampno normalization
Beatport (DJ)−9 to −11
Vinyl−15 to −18
Podcast−16 to −19

Want a written report instead of just numbers?

Optional: leave your email and we'll send a PDF report with your track's analysis + 3 specific suggestions for what to fix. No spam — one email per analysis you run.

Common questions

What does the free check measure?
Integrated LUFS, true peak (inter-sample), loudness range (LRA), and frequency profile. Then we tell you what gain reduction each streaming platform will apply.
Do I need to sign up?
No. The check itself is free, no account required. Email is optional — only if you want a written PDF report.
What file formats work?
WAV, MP3, FLAC, AAC, OGG. Up to 100 MB. We process in your browser when possible — your file never sits on our servers longer than the analysis takes.
How accurate is it?
Same BS.1770-4 algorithm streaming services use, with 4× polyphase sinc true-peak detection. The analyzer is the same one driving our paid mastering chain — no watered-down free tier.
What if my master isn't hitting the target?
The free check tells you the gap. If you want to fix it, our 24-stage mastering chain at /app targets the exact LUFS your distributor expects. Free A/B preview before you pay anything.