Well I would say my main problem is with slurring, which can make it very difficult for me to be understood sometimes (sometimes I just get humming noises because my lips won't move at all!). But I also sometimes have problems controlling the pitch of my voice and recently I was given some cinnarizine by my GP, which I had extremely bad reaction to, and which made my speech very high pitched and wavering. I could do nothing to control it. Other times I stutter or use completely the wrong words - again, no control over how it comes out. Now I am scanning my speech a lot, the words are very broken up and my voice quite sort of croaky and slow sounding. Making any effort to inflect the voice is tiring, so it makes sense that it would sound monotone. Well that's how it is!

wild_cat