The Note D

D as a musical pitch: its frequency, spellings, and the harmony built on top of it.

D is a guitar-friendly key, particularly for open-string voicings. D major has a bright, joyful character and is one of the most common keys in folk, country, and pop music. Its reference octave pitch is 293.66 Hz (MIDI note 62). The major triad on D is D Major (D – F# – A), and the minor triad is D Minor (D – F – A).