Software Volume Control question

The thread I post in got locked, so I’ll post here, and hopefully my post isn’t what locked it:

One thing that I am not understanding is the changes of the audio processing with toggling the ‘Software Volume Control’ between ‘On’ and ‘Off’. With the volume control activated and set to 0db, it sounds much warmer and darker. With it off/disabled, the sounds more detailed but thinner with a little break up on top. I kind of thought these would sound the same, but the sound is quite different. What exactly is going on?

Bump to get an answer.