and continuing our journey in one box footsteps we look at the legacy of slavery in the 1st freetown in the americas. many animals communicate via their voices and pitchin intonation play a key role in the process because those elements predate any kind of language or grammar in humans what you say is often less important than how you say it. u.s. president barack obama. finds this nation together is not the color of our skin apple's steve jobs. 3 separate device. this is what the but i german politician great is made of washed the obama. 3 charismatic speakers with something to say but if you think that content is the main aspect of speaking you're wrong how we say it is much more important. it's been so for. the quality of the voice and the intonation played the biggest role in bringing across a statement to the listener researchers say. this catalyst will not only can i measure how well you speak i can also turn you into a better speaker. together with fanatics expert oliver neber we've devised an experiment we invited 12 volunteers to a recording studio half of them made up the j