I think it's a combination of luck, genetics, and training. Just like with bio-guys, some guys squeak and squawk for months on end, unable to even talk effectively, while others gradually slide down in tone with only the occasional break. So far mine has been the latter, thank goodness, and I have managed to maintain a decent singing voice, with my range slowly dropping out some of the higher notes, and adding some lower ones. But it hasn't made a dramatic drop yet. (I've only been on T for about 9 weeks.)
Hopefully Dennis will be along shortly to tell his story. He went from an alto/tenor to a bass, and passed the audition to get into a pretty exclusive singing group, post T.
On the other hand, there are plenty of examples of guys who always sound as if they are sucking helium. My theory is that they continue to try to talk in the range they are accustomed to, even after their vocal cords thicken, but I may be wrong about that. I have known guys who had trouble with their voices after a year or more of T, and they were helped immensely by vocal training.
So, yeah, I guess the answer is it's possible, but not inevitable that you will lose your singing voice.
Post Merge: June 25, 2009, 06:00:59 AM
Quote from: Josh on June 25, 2009, 05:57:00 AM
well... think of how many singers are male. its basically the same except they get their testosterone from their nuts at puberty.
not like only eunuchs or women can sing ya know. 
Yes, but our "puberty" goes a
lot faster, and starts after our bodies are in a more "fixed" state than a pre-pubescent boy's. That can make a difference in how things change.