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Potpourri or Pot-Pourri (; French, literally "putrid pot") is a kind of musical form structured as ABCDEF..., the same as medley or, sometimes, fantasia. It is often used in light, easy-going and popular types of music.
This is a form of arrangement where the individual sections are simply juxtaposed with no strong connection or relationship. This type of form is organized by the principle of non-repetition. This is usually to be applied to a composition that consists of a string of favourite tunes, like a potpourri based on either some popular opera, operetta, or a collection of songs, dances, etc.
The term has been in use since the beginning of the 18th century, or to be more specific, since it was used by the French music publisher Christophe Ballard (1641-1715) for the edition of a collection of pieces in 1711. In the 18th century the term was used in France for collections of songs which, with a thematic link, were sometimes given stage presentation. Later the term was used also for instrumental collections, like the "Potpourry français", a collection of originally unconnected dance pieces issued by the publisher Bouïn.
Potpourris became especially popular in the 19th century. The opera overtures of French composers, such as François-Adrien Boïeldieu (1775–1834), Daniel Auber (1782–1871) and Ferdinand Hérold (1791–1833), or the Englishman Arthur Sullivan (1842–1900) belong to this type. Richard Strauss called the overture to his Die schweigsame Frau a "pot-pourri".
The "overtures" to light modern stage works (e.g. operettas or musicals) are almost always written in potpourri form, using airs from the work in question. There is usually some structure to the order presented though. The opening is usually a fanfare or majestic theme (presumably the supposed hoped-for most popular song number), followed by a romantic number, then a comical number; and finally a return to the opening theme or a variation thereof.
The Italian guitar virtuoso Mauro Giuliani, (1781–1829) entitled a number of his works "potpourris": Potpourri, Opp. 18, 26, 28, 31, 42, and Potpourri Romano, Op. 108
There are many more pieces called "potpourris":
"If music is frozen architecture, then the potpourri is frozen coffee-table gossip... Potpourri is the art of adding apples to pears..." (Arnold Schoenberg: "Glosses on the Theories of Others" (1929), See "Style and Idea", Faber and Faber 1985, p. 313–314)