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... it seems that the rather good initial quality from biab cannot be obtained in RB.





That is certainly not the case here. My soundcard settings are normalized, though. "What goes in is what comes out" as regards amplitude at 1KHz.

However, .mgu or .sgu files made in BIAB do indeed sound different when first opened up in RB here. The reason is that each track was sent from BIAB at a certain level as set in the BIAB controls. But when opened in RB, the default for each track is set at the same place. This in itself creates a gain staging change that may or may not be apparent, depending upon a few other things such as the level of the track originally, the level of the other tracks comes into play also as digital audio is additive in nature, even despite the 32 bit mix engine.

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Another thing I have noticed is that when recording in RB the input gain should be so much higher than in biab (potential for more noise). Could be a related issue.




This is a good clue. Tells me that there must be something different about your soundcard's mixer applet settings, most likely in the Record properties -- may also have to do with how the Prefs are set up in the two different programs, too. Not knowing the brand and model of soundcard you have, I cannot comment further. But that should not be happening if your system and host programs are properly set up. Does not happen here. More info may get you more answers as to how to go about ironing that out.


--Mac