OrynosMusicFree audio check
Loudness & headroom.
Measure integrated LUFS, RMS and peaks. Your audio stays in your browser.
Choose your mix
WAV, or an audio format your browser can decode. Mono or stereo, up to 8 minutes. Device limits apply.
No upload. No account. No credits.
Reading audio…
Your audio
- Integrated loudness
- Not measuredLUFS
- Estimated true peak
- Not measureddBTP
- Average signal level
- Not measureddBFS RMS
- Sample headroom
- Not measureddB
K-weighted, with loudness gating
4× interpolated estimate
Combined channel mean square
Distance from sample peak to 0 dBFS
More measurements
- Sample peak
- Crest factor
- Stereo correlation
- Side energy share
Correlation describes channel similarity; side energy describes the Mid/Side energy split. Neither is a sound-quality score.
Plan a level change.
See what simple gain would do to loudness and peaks. This calculator does not process your audio.
The starting values are examples, not universal delivery requirements. Choose settings for the music and its destination.
What do these numbers tell you?
LUFS and RMS
Integrated LUFS measures gated, frequency-weighted loudness over the file. RMS measures its average signal energy without that weighting. They answer different questions, so their numbers need not match.
Peaks and headroom
Sample peak is the largest stored sample. A reconstructed signal can peak between samples, which is why the meter also estimates true peak. Headroom is not proof that an earlier recording never clipped.
Measure, then listen
A louder file is not automatically a better master. Compare at matched listening volume and check transients, vocal balance and distortion. These readings do not rate artistic or mastering quality.
How the meter works
Integrated loudness uses BS.1770-style K-weighting, 400 ms blocks and absolute and relative gating. True peak uses 4× windowed-sinc interpolation. This browser meter is an estimate, not a certified delivery meter.
PCM WAV is analyzed at its source sample rate. Other supported formats are decoded at 48 kHz; browser decoding and resampling can affect peaks. Very short or near-silent files may not produce a gated loudness reading.
Measurement references: ITU-R BS.1770 and EBU Tech 3341.
Ready to work on the sound?
Choose a mastering model and compare your result at matched volume. Website mastering uses your verified account and the displayed credit cost.