Playing a little with programs I've never used before, I found a very obvious panel that I think gave me some results similar what I was looking for.
I mean this very evident panel:
Applying 4 pitches down and around -1500 formants, it's enough to get something near of I was expecting.
I found out that it saves me from dragging waveform up and down.
So, I think I'm satisfied with the result I got, for while.
I have to learn a lot more about this programs. Reaper too.
If is it the case, I'll come back for more questions.
Thank you all, gentlemen.