Lesson 2-1-13 - High D
High D is one of the easiest high notes to play for a learner whistle player.
It's made by covering the bottom five holes, and leaving the top hole clear.
The most important thing is covering the hole completely. After that, it's tough to over-blow, so beginners tend to find that they can make a clear High D relatively quickly.
As you'll notice in the graphic, High D is notated with a lowercase d in simple notation.