EBU R128 loudness normalization

EBU R128 loudness normalization (loudnorm) would be very useful. Specially double pass.

I have logged your interest in this feature.

Note that there are already a couple of alternative ways available for “loudness normalization”. See these links:
https://forum.audacityteam.org/t/rms-normalize/45334/1
https://forum.audacityteam.org/t/replaygain/22589/1

Thanks for the links and logging it. I am very pleased with loudnorm results in my ffmpeg scripts and I thinks it will be a great addition to the Audacity features.