I have the feeling that clicking on the Apply button of LAN window has no effect on the pegel of my session, after I have changed the Target value of the Integrated Loudness value to -14 (Youtube spec).
When I re-analyze the session the integrated loudness’ Target is set to -14, but the sound is kind of as it was before the normalization and the diagram still shows the integrated loudness value (the green line below) at around -23 as it was originally. What am I missing here, can any one please help?
Here is the LAN window after one time applying the normalization, note the green line…
In your case the limiting factor is the digital peak.
11.2dB gain would need to be added to reach the -14 LUFS target, but that would clip the audio, since the peak signal is already -1dBTP.
In order to meet both constraints you would need to add a Limiter or Compressor to shave off some digital peaks, or bring up the overall volume while reducing dynamic range.
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PS. During export, Ardour can do this automatically, there is a built-in limiter with fixed 10ms release time.
When manually matching Loudness you can use a limiter or a multi-band compressor to your liking.