What does LUFS / Loudness Meter do?
Integrated loudness uses gating over the full first audio track. True peak estimates inter-sample overshoots and can exceed sample peak. Compare identical sources and channel layouts: decoding, resampling and gating can affect results slightly. Short-term and momentary graphs are not exposed.
How to use LUFS / Loudness Meter
- 1Choose local audio or a video with sound.
- 2Start Measure loudness to load the local analysis engine.
- 3Compare integrated LUFS, sample peak, true peak and LRA.
- 4Use Audio Normalizer separately if you want to change levels.
Supported inputs and outputs
Inputs
WAV, MP3, M4A, OGG, MP4, WebM
Outputs
Local loudness report
Practical uses
- Prepare and review a creator recording with lufs / loudness meter.
Browser and media limitations
- Very short clips and silence can yield uninformative loudness range.
- Large files can exceed browser memory. Playback and codec support differ by browser.
How local processing works
Your media is processed locally in your browser and is not uploaded to Tubelexity for processing. Page requests, engine downloads and privacy-filtered analytics still use the network.
Frequently asked questions
Why are LUFS and peak different?
Integrated LUFS estimates average perceived loudness with gating. Sample peak measures the highest stored amplitude; true peak estimates peaks between samples.
Does YouTube require exactly −14 LUFS?
No. It is a common normalization reference, not a hard upload requirement or an acceptance test.
Why is LRA zero for my short clip?
Loudness range needs enough varied material. A short constant tone or brief clip may yield zero or an unhelpful value.
Is my file changed?
No. The analysis sink is discarded. Only source measurements are shown; no normalized media is exported.