I have recently started ripping CD's in FLAC and using the Replay Gain DSP (not RG Apply). I've also manually added RG tags to some previously ripped FLAC files. I've been using Foobar2000 v1.3.6 to test the Replay Gain feature and I've noticed the following. When I load tracks into the Foobar playlist and select that track I can see the replay gain values in the general information window above the playlist. I've noticed that not all tracks display RG information in Foobar yet even for tracks not displaying RG values the RG process seems to be working and leveling volume. Just curious why the values wouldn't show for all tracks and if Foobar is applying its own replay gain processing on the files that don't display RG values. I know this isn't a Foobar forum but I'm trying to figure out how Replay Gain works in general.

Thank you,