types:
chorus
a group of people assembled to sing together
ensemble
a group of musicians playing or singing together
section
a division of an orchestra containing all instruments of the same class
trio
three performers or singers who perform together
octet,
octette
eight performers or singers who perform together
orchestra
a musical organization consisting of a group of instrumentalists including string players
band
instrumentalists not including string players
choir
a chorus that sings as part of a religious ceremony
reed section
the section of a band or orchestra that plays reed instruments
barbershop quartet
an unaccompanied quartet of (usually male) voices singing sentimental songs in four-part harmony
gamelan
a traditional Indonesian ensemble typically including many tuned percussion instruments including bamboo xylophones and wooden or bronze chimes and gongs
marching band
a band that marches (as in a parade) and plays music at the same time
brass band
a group of musicians playing only brass and percussion instruments
jug band
a musical group that uses jugs and washboards and kazoos and other improvised instruments
big band
a large dance or jazz band usually featuring improvised solos by lead musicians
mariachi
a group of musicians playing a style of Mexican folk music featuring trumpets, guitars, and violins
steel band
a band that plays instruments made from the heads of oil drums (Caribbean Islands)