I turned on a certain feature on the login screen and now my password is read out loud when I type it on login. What did I turn on, and how do I turn this back off?
It is probably the Orca screen reader that does this. Turn it off if you do not want this to happen.
(hit dash and search for orca)
Oh and it is possible you turned it on, by accident, at the login screen.
Make sure "Screen Reader" is unticked.