sonata
a form, but also a composition for 1-2 instruments only
piano sonata
a sonata for solo piano
violin sonata
a sonata that is equally for violin and piano
classical concerto
opening movement (fast, double exposition sonata form), slow movement (varied form), and closing movement (very fast, mostly rondo form)
double-exposition form
extended version of sonata form; orchestra exposition, solo exposition, development, recapitulation, solo cadenza, orchestra's cadence theme
string quartet
2 violins, a viola, and a cello; opening movement, slow movement, minuet (with trio), and closing movement; small informal audiences
chamber music
music for 2-9 players
piano trio
violin, cello, and piano
string quintet
string quartet with an extra low instrument
opera buffa
Italian comic opera