Quote:
The important thing to be aware of is that the "recorded levels" are sufficient to give a good signal to noise ratio so that noise is not readily apparent in the track or the mix.


I think Herb's observation above is the key consideration.

I always figured that the real tracks themselves were optimized to give you a good signal, and the default volume setting in RB was set low enough to allow headroom for mixing.

If you watch the VU meter, adding more tracks adds intensity to the mix. Since you can add more tracks in RB than is possible in BIAB, if the tracks started out at the same volume that was right for the number of tracks you get in BIAB, the mix would be clipping in no time.

Once I get all the tracks I want in the project, then I start to raise individual track volumes as needed, either through gain adjusting or compression (gentle levelling) until the VU meter for the whole project is where I want it to be.