Like I mentioned, I can talk about how the pro's do it but I don't bother with that myself. Doing a quick gain change works for me too but, I suspect that RB is looking at your other 10 tracks, sees the levels and generates a new part low because if your mixing them the correct way you would be lowering all the other tracks not raising the new one.

As to Sonar I suspect it's the same thing. You import your 10 wav files that you created in RB. Say they're all around -3db. Sonar is probably lowering them all for the same reason I just talked about. They have to be low otherwise when you combine them for the mix the final stereo track will be way too hot and clip unless you have it set up to do automatic limiting which a good mixing engineer would not want because automatic limiting just took him out of the equation. Hitting the automatic Merge to Stereo Wav button turns a pro engineer into one of us. A home hobbyist who just uses the defaults and calls it good.

I used to do a lot of live band recording but not lately. I would take those tracks from my Akai DPS 16 HD recorder and import them into Adobe Audition. Audition does not have automatic leveling for a mixdown or if it does I never set it up for that. If I tried to mix a bunch of tracks that were too hot the result would be solid black in the waveform window and the sound would be total distortion. Why? Because Audition is emulating a real studio and if you try that there, that's the result you get. I would then have to go and lower the levels of all the tracks so I would have something useful to work with for my final mix. I might have put some effects on a few tracks but still needed to leave headroom for EQ in the final mix. By that I mean if the initial trial mix gave me a very hot mix up to -1 or 2db that's not enough headroom to apply any EQ. The slightest bit of EQ would push the whole mix over the top. This has nothing to do with me trying to get the hottest original raw recording I could using my Akai. The source recording always is as hot as I can get it without clipping to get the best S/N ratio but when it goes into Audition the levels get reduced for mixing.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.