Impromptu

A lyrical music in the 19th century. The English name originally meant improvisation or temporary whim, and later developed into the name of a short instrumental piece. Often adopt the form of cantabile, such as F. Schubert's works 90 and 142, F. F. Chopin's works 29, 36, 51 and "Fantasy Improvisation". "Qu" is a model work of this genre. B. Britten once used this word as the title of the revised third movement of his piano concerto.

A lyrical song of the 19th century. Improvisation refers to the sporadic nature of creative motivation, similar to the "accidental" in classical Chinese poetry. F. Schubert's works 90 and 142 and F.F. Chopin's works 29, 36, 51 and "Fantasy Impromptu" are exemplary works of this genre. The so-called improvisation means not writing out the score in advance, but creating and playing on the instrument at the same time. After the 19th century, improvisation was no longer popular. Whether it was a fantasy or an impromptu, the score was written out before being played, but the style still had some characteristics of improvisation.