If you have done what I’ve explained and it’s still quiet, there are pretty much only two possibilities I can imagine. 1. Your Limiter is in the wrong spot, or still has the wrong settings, or 2. Your Master bus fader isn’t at unity (0db), so it’s cutting your volume at export.
First, make sure the limiter on your master bus is the VERY LAST plugin (bottom most). Also make sure your master fader is set to unity (0 db). So if you followed my instructions, your limiter is showing audio output as close to -1 or -2 db. If it’s not showing that at its output meter, then increase the input dial more until you’re closer to that point.
On your master fader’s meters you can see exactly how loud your track will be at export. If it’s still bobbing around way below -1 to 2-, then simply turn the limiter input dial up more, or it’s limit dial more (compressing it further, so be careful with that dial).
My second guess of your issue, is that you simply have your master fader dial turned down, so after all your hard work getting the limiter perfect on its meters… The master fader is then cutting all that volume you’ve added immediately back down again. Does that make sense? The limiter makes it louder but then your fader turns it back down again?
-Mix your track
-Set master fader to 0 (basically you never need to touch your master fader)
-Add a limiter as your last plugin
-Push the compression and input volume in the limiter as high as you’d like.
-Take a final glance at your master fader’s average levels to make sure they’re loud enough (this will vary by genre/song).
-If they’re not, go back into your limiter and turn it louder.
-Export the tune.
Basically if it sounds good I’m your headphones, and the mixing is done, then don’t worry about normalizing. You’re already way past that point. It’s just time to get your limiter set right, and export.