Method

Audio loudness range

Loudness range (LRA), EBU R128

What we measure and how

Loudness range (LRA) quantifies the macroscopic dynamic range of a programme — how far the loud passages are from the quiet ones, on the same perceptually weighted scale as integrated loudness. Measured per EBU Tech 3342 as the difference between the 10th and 95th percentiles of the gated short-term loudness distribution, where short-term loudness is a 3-second sliding window per ITU-R BS.1770-4 and the gating discards both absolute (below -70 LUFS) and relative (below -20 LU from the ungated mean) measurement blocks. Reported in LU over the full programme.

Provenance

Standards

EBU R128 · ITU-R BS.1770-4 · EBU Tech 3342

Spec fields consulted

These Universal Media Delivery Profile paths resolve this check's thresholds against your spec snapshot at the moment the job was submitted.

• · assets.audio.loudness.lra_max

The full UMDP schema: /umdp.

Related methods

• Audio dialnorm
• Audio loudness speech gated
• Audio quasi peak
• Clipping
• Loudness

Method identifier: audio_loudness_range