Mastering and loudness
Load a finished mix, see how loud it really is, and bring it to the level streaming services expect. Measure LUFS and true peak, add a limiter, compare before and after at the same volume, then export. Your audio never leaves your device.
1. Load a track
No file yet. WAV, MP3, M4A, OGG and FLAC work in most browsers.
2. Loudness
| Measure | Original | Mastered |
|---|---|---|
| Integrated loudness (LUFS) | – | – |
| Loudest short moment (LUFS, 3 s) | – | – |
| Loudness range (LU) | – | – |
| True peak (dBTP) | – | – |
| Sample peak (dBFS) | – | – |
| Gain change / limiter reduction | – | – |
3. Master
4. Compare
0:00 / 0:00
5. Export
What the numbers mean
- LUFS measures how loud music seems, using the ITU BS.1770 method with gating. Streaming services turn loud tracks down to about −14 LUFS, so a track mastered far louder does not play louder, it only loses punch.
- True peak catches the peaks between samples that can distort after MP3 or AAC conversion. A ceiling of −1 dBTP is the usual safe choice.
- The limiter looks 2 ms ahead, so it stops peaks without clipping. The tool raises the level until the loudness target is reached, within the ceiling.
- Hitting a very loud target on dynamic music means heavy limiting. Watch the reduction figure. Past about 6 dB the sound starts to flatten.