Adolf Hitler speaking with Carl Gustaf Mannerheim on a private train in Finland in 1942.
So accustomed to the usual ranting nature of Adolf Hitler’s speeches, we find it difficult to imagine his normal conversational tone. This is purported to be the only known recording of Hitler’s usual speaking voice. Source: The Only Known Recording of Hitler’s Normal Speaking Voice, As He talks to Finnish General Mannerheim
Here is the voice we are are accustomed to hearing: