Topics range from species counterpoint through post-tonal and beyond. See also the Dictionary of Digital Media.

d
- Da capo
- Deceptive cadence (DC)
- Decrescendo
- Degree inflection
- Delay
- Derived set
- Descending
- Diapason
- Diapente
- Diatessaron
- Diatonic
- Diatonic pitch
- Diesis
- Digital audio tape (dat)
- Digital synthesis
- Digital-to-analog converter
- Diminished interval
- Diminished scale
- Diminished triad
- Diminution
- Direct modulation
- Direct octaves or fifths
- Disjunct
- Dissonance
- Divisions
- Dodecaphonic
- Dolce
- Dominant
- Donut
- Dotted note
- Double
- Double bar
- Double flat
- Double fugue
- Double neighbor group
- Double sharp
- Dub
- Dur
- Dux
- Dyad
- Dynamic range