[MLA] AES71 comments

[Ian Shepherd]

> Maybe the solution for fallback in the absence of metadata on portable devices we recommend a gain boost of 7 dB with a protection limiter. Since it's music it's likely to have a PLR of less than 16 dB so if it was normalized to -23 it would hardly trigger the limiter. But without metadata how do you know it's music? And if they normalize regular program to -23 it will be too low for many portable devices, also. 
> Shit (excuse my French)
> 

We’ve settled on around -18 LUFS for my podcast, which is plenty loud on my (European) iPod with stock earbuds. Anecdotally the BBC seems to be similar, and also works works fine, for the most part.

We should look back through our notes for the meeting where the podcast providers joined in, Bob - from memory most of them had also settled on -16 or -18, I think.

I assume your concern is that raising normal program to -16 would trigger excessive limiting, Bob. Perhaps suggesting -18 (which is the median of the AES recommended range) for everything would be a workable compromise, when there’s no meta-data ?

Ian


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