Congratulations on finding a workaround. Denis @K0TX will probaby comment with the authoritative answer.
I am not a SignalLink user, although I regularly particpated in digital nets with users who do. I do not know the details of Denis’s @K0TX design choice for the default output gain. I’m always happy with more distortion-free gain because it gives more headroom for whatever I am trying to do. Are you annoyed because you want the Windows 11 sound settings to be the same for both SignalLink and Digirig? Are you using Digirig for VOX, or taking advantage of PTT?
I appreciate the Digirig’s gain when I use budget computer headset for voice. That requires more gain than the digital radio modes.
@KI5OPY developed HAM Audio Bridge:
You might also solve the settings issue with a software mixer like Banana to do the additional attenuation before the Digirig TX stage. Then you push the config issue into another piece of software, rather than having to change Windows sound settings when you switch between Signalink and Digirig.
73 Constrainted