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Loudness Range Calculation #927

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cjunekim opened this issue Nov 12, 2017 · 2 comments
Open

Loudness Range Calculation #927

cjunekim opened this issue Nov 12, 2017 · 2 comments

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@cjunekim
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@cjunekim cjunekim commented Nov 12, 2017

Hi

It seems like the relative threshold for gating is set to -10 currently, instead of -20. According to EBU TECH3342 notes, The relative threshold should be -20 under the absolute gated loudness level. https://tech.ebu.ch/publications/tech3342

Moreover, I don't think the absolute threshold gating works, either. If I insert silence for a period to an audio track, the loudness range changes significantly. Instead, it should not change, since it has to be gated and not considered at all in the percentile calculation.

@nofishonfriday
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@nofishonfriday nofishonfriday commented Nov 12, 2017

Confirmed regarding the relative gating threshold. Changed from -10 to -20 for the next build.

About absolute gating, I couldn't confirm your observations yet in first tests.
I'll do more testing but if you could provide an example project where it happens (with audio) that would be helpful too.

@nofishonfriday
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@nofishonfriday nofishonfriday commented Nov 10, 2019

Changing relative gating threshold from -10.0 to -20.0 was reverted in v2.10.0 (as it wasn't correct, technical explaination).

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