a
- A.B
- ABRSM
- ABRSM Publishing
- Adastra
- Admira
- AKG
- Alesis
- Alfred Publishing
- Alpha
- Angel
- Aquarian
- Aquila
- Aroma
- Artino
- Aulos
- av:Link
b
- Barnes & Mullins
- Behringer
- Bon Musica
- Boomwhackers
- Boosey & Hawkes
- Boss
- Boston
- Brass Wind Publications
- Brunswick
- BST
- Bull
c
↑ Topd
↑ Tope
↑ Topf
↑ Topg
↑ Toph
↑ Topi
↑ Topj
↑ Topk
↑ Topl
↑ Topm
- M-Audio
- Mahalo
- Manuel Rodriquez
- Marshall
- Martin
- McBrides
- Meinl
- Mel Bay
- Mercury
- Montford
- Muco
- Music Exchange
- Music Gift Company
- Music Sales
n
↑ Topo
↑ Topp
↑ Topq
↑ Topr
- Rainbow Fantasia
- Rathbone
- Regal Tip
- Remo
- RGT
- Rhythm MP
- Rico Royal
- Robin Reed
- Rock Off Officially Licensed
- Rock School Limited
- Roland
- Rotosound
- Royal Irish Academy of Music
- Ruach