Downtalk = Confidence
What downtalk is, is basically lowering your tone of voice from your base level at key words in a sentence, as opposed to uptalk which is when you raise your tone of voice at those same points.
For example, say you ask a girl "So, what do you like to do for fun?"
Typically if you're nervous you'll say it in an uptalk manner, I'll write the sentence again but put a
after the words that would typically be affected.
"So, what do you like to do for fun?" say that outloud, the parts without the is just your neutral base tonality.
Ok now compare that to this, [D] for down:
"So[D], what do you like to do for fun[D]?"
The question said in this manner sounds so much more dominant and confident. Since consciously starting to implement it in my speech with women, I've been getting much better reactions and it actually makes you feel more confident as well, the more you do it.
This dude gives a little example Click me and at the end says the same thing as me about how doing the downtalk actually made him physically feel more confident.