I am not a native German speaker but have lived in Germany for several years. Can a native German speaker explain to me why the Article here is "den" when it is only 1 dog. Shouldn't it be "dem Hund" or "den Hunde"?
It's just an overemphasised 't'. Normally it would "merge" with the following 'd', like in English, but the voice synthesiser cannot reproduce these contextual pronunciations. I don't think it can be fixed.