I am relatively new to foobar but am now using it to add replaygain to my flac's. At the default setting of 89db I find it a bit low so wanted to set it to 92db instead. I go to preferences/advanced/replaygain and set "target volume level" to 92 instead of the default 89. I cleared replaygain info from a file and told it to scan per track gain. It comes up with the exact same -11 value that it did the first time when it was set to 89db. I tried it again and set the target volume to 98db, same thing, it still comes out with -11.
I have replaygain 2.2.2 and foobar 1.3.15.
Either I am missing something or changing the target volume simply has no effect at all.
ReplayGain target level isn't adjustable as it's a standard. There are quite many threads about this that at least Google search finds instantly. A few in chronological order: 1 (https://hydrogenaud.io/index.php/topic,35255.0.html), 2 (https://hydrogenaud.io/index.php/topic,35591.0.html), 3 (https://hydrogenaud.io/index.php/topic,54668.0.html), 4 (https://hydrogenaud.io/index.php/topic,84265.0.html) and 5 (https://hydrogenaud.io/index.php/topic,106476.0.html).
In the replaygain page of the settings, you can add preamplification, to adjust the final loudness of replaygained files. +4 or even +6 dB should be possible with modern music, with no issues.