Brands – D
- D-Grip
- D'Addario
- Da capo entertainment
- DALI
- Dampit
- Danelectro
- Dava
- Dean Markley
- DEG
- Delu
- Demond und Reihl Musikverlag
- Denis Wick
- Despiau
- Dictum
- Doblinger
- Dogal
- Dogs and Birds
- Dolfinos
- Don't Fret
- Dörfler Verlag
- Dover Publications
- DR Strings
- Dreipunkt Schulze Media
- Dresden
- Drum Tech
- Dux Edition
- Dycem
- Dynamic Ear Company
