In any recent version of RB or PTPA there is a master output section that sends to the soundcard and it has four FX slots in it for mastering..

So the description you used still isn't making sense to me
Bottom right of mixer, the master output slots are the last thing the song goes through.
I believe that 'all' slider happens before that set of FX slots.. sort of a way to control how much you are pusing the master FX.

That 'all' slider stays at 100% here.. I use other ways of controlling the volumes


Make your sound your own!
.. I do not work here, but the benefits are still awesome