I’ll use Snagit to add voice to this later. (I need a different microphone and a quieter venue with better acoustics.)
The linguist uses the International Phonetic Alphabet to indicate rising intonation, e.g., in an interrogative:
He found it on the street?
[ hiː ˈfaʊnd ɪt | ɒn ðə ↗ˈˈstɹiːt ‖ ]
The reader/speaker can use intonation to change attitude or meaning:
You are young.
1. ↗You are young, as opposed to others, perhaps me, the [the older, wiser] speaker.
2. You ↗are young, in case you don’t think so.
3. You are ↗young, to quite a degree.
So you know everything.
1. So ↗you know everything, as opposed to me, the [more enlightened] speaker.
2. So you ↗know everything, emphasizing the act of knowing.
3. So you know ↗everything, emphasizing that you believe you are informed [perhaps a know-it-all].