capriccio, caprice, capriccioso, capricieux, capricieuse—a short character piece, typically in a humorous, fanciful, or playful manner. The concept juxtaposes the improvisatory free-form fantasy against the more formal, "serious" and logically "worked-out" sonata forms.Within a caprice, the range of expression may well include the serious and dark as well as demanding extraordinary technical skills such as a prelude or etude.
chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
fugue, fuga, fuge [G], fuguette, fugen [G,pl]—a contrapuntal procedure (form) involving a musical subject (theme) that is successively imitated by multiple overlapping voices. There is a vast canon of rules (concepts) for creating elaborate and diverse fugues with an infinite variety of character based on fairly specific parameters. Fugues (or partial fugato) are found throughout classical music from the late Renaissance to the present.
intermezzo, intermedio [S], intermède [F], interlude, Entr'acte—music that is "inserted" (or "interpolated) between two musical entities of greater importance (e.g. movements, acts, verses, etc.). Often suggests music of a lighter character, entertaining contrast or even improvisation.
intrata [I], intrada—entrance, introduction
passacaglia, passacaille [F], pasacalle [S]—A variation form based on a recurring bass line or chord progression closely related to the chaconne. Of Spanish origin first appearing in the early 17th century. Some generalizations suggest a grave character, a minor key and a triple meter. wiki
prelude, prélude, präludium [G], präludien [G, pl], praeludium, preludio—a movement preceding another almost by way of introduction: to let listeners and players acclimate, often to prepare for greater demands ahead
quartet, quatuor [F], quartett [G], quartetto [I], cuarteto [S]—ensemble or work for four players the most important examples being the string quartet and the piano quartet
string quartet, Streichquartett [G], quatuor à cordes [F], quartetto d'archi [I], quartetto di cordi [I], cuarteto de cuerda [S], vonósnégyes [H]—ensemble or a work written for that ensemble comprising 2 violins, viola, and cello. This is one of the essential genres/forms/ensembles of chamber music and arguably a critical "core" of "classical" music. Explore the string quartet | wiki