This information from the private essay: History 4: lesson 110.
| Higher Notes | Lower Notes | |
|---|---|---|
| Law #1: | Shorter Strings | Longer Strings |
| Law #2: | Tighter Strings | Looser Strings |
| Law #3: | Lighter Strings | Heavier Strings |
You can make higher notes on a guitar (or any other string instrument) by pressing down on a long string to make the functional part shorter.