Radriano..my sympathies for the suffering of your family members.
I am glad you are here and glad you are able to find joy in song.
On the other hand, sometimes the amazing power of music is able to
erase halting speech. I knew a friend who had many difficulties in
speaking, but was able to sing smoothly and flawlessly. Perhaps it
is a different part of the brain used for singing than for speaking?
Or perhaps because the lyrics can be predicted and practiced. I saw
a documentary recently where stutterers wer able to learn to control
their breathing mainly by placing a belt-like band around their
chest to help them control their breathing and speaking. this was
a Swedish method and had incredibly positive results. the people
in the program were able after a couple of weeks of practice, to
stand on a street corner and give a speech to passing strangers!!
No small accomplishment..more info here:
http://www.stammeringcentre.org/links/stammering.html
http://www.swedish.org/16888.cfm\
http://www.stutterisa.org/