Is the K-weighting filtering applied to a Wav file after it's Loudness has been analyzed?

Question

I've been looking into enabling the Loudness Normalization feature in Wwise, but it's been hard to find info on what's happening under the hood once this is enabled, aside from an analysis of a Waveform's loudness measurement and then a gain boost or reduction depending on how close it's measurement is to -23dB.

I've noticed a slight boost in the high-mids to high frequencies in my content after the normalization has been enabled, so that makes me wonder if the K-weighting filtering is being applied to the Wav file? To get it's loudness measurement, I know it would go through the process of K-weighting filtering, but I'm more so wondering if that K-weighting is actually Processing the affected Wav file after the fact? Like, is it actually boosting those frequencies? Or is that just a process it gets run through to determine it's loudness?

Answer 1

No, the k-weighting filtering is not applied to the signal, it is only for metering purposes. Note that, in loudness normalization, the loudness estimation uses a slightly different method than the one used for metering.

As for the slight boost you're seeing in some frequency ranges, this is not something we would expect: the gain is applied uniformly to all frequencies.
If you think you have found a bug and can provide information on the discrepancy you're seeing, you can fill a Bug Report (https://www.audiokinetic.com/library/edge/?source=InstallGuide&id=reporting_bugs).