what is the meaning of "High D"?

--------------------------------------------------
Rise to the top 3% as a developer or hire one of them at Toptal: https://topt.al/25cXVn
--------------------------------------------------

Music by Eric Matyas
https://www.soundimage.org
Track title: Puzzle Game Looping

--

Chapters
00:00 What Is The Meaning Of &Quot;High D&Quot;?
00:22 Accepted Answer Score 6
00:47 Thank you

--

Full question
https://english.stackexchange.com/questi...

--

Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

--

Tags
#meaning

#avk47