Lots of Hitler's speeches are available in newsreels these days. Much from radio -- Adolf Hitler — Appeal to the nation, July 15, 1932 [English subtitles]
I listened to just a little of it, to say the subtitles are pretty accurate. Interesting to hear this evil asshole speak. Colored in a light Austrian accent....
This is his true speaking voice, it was much deeper than I expected, from a meeting with Finnish Marshall Mannerheim.
The other thing about this, is how blunt Hitler was about the situation in Russia.
https://www.youtube.com/watch?v=oET1WaG5sFk