B
back phrasing
backbeat
backing track
backing vocals
baffle
bagpipes
balanced line
ballad
band-pass filter
banjo
bar
barcarolle
baritone
Baroque period
Baroque guitar
barre
barrel organ
Bartók, Béla (c. 1881–1945)
bass
bass baritone
bass drum
bass guitar
basso continuo
basso ostinato
bassoon
batter head
beam
bearing edge
beat
beat displacement
beat music
beats
Beethoven, Ludwig von (1770–1827)
bel canto
Bellini, Vincenzo (1801–1835)
bells
belting
bend
Berlioz, Hector (1803–1869)
Bernstein, Leonard (1918–1990)
binary
bitonal
Bizet, George (1838–1875)
blending
blue notes
bluegrass
blues
blues harp
blues scale
bodhrán
bongo
boogie-woogie
bop
bottleneck, slide, and slide guitar
Boulez, Pierre (1925–2016)
bouncing
bow
bowed lyres
Brahms, Johannes (1833–1897)
brass
break
breath control
breath support
breathiness
bridge (of an instrument)
bridge (of a song)
British Invasion
Britten, Benjamin (1913–1976)
Bruckner, Anton (1824–1896)
brushes
buccina
bugle
buzz roll
Byrd, William (c. 1543–1623)