Stylistically, the prelude is improvisatory in nature. Overture in music is the instrumental introduction to a dramatic, choral (1911encyclopedia.org) or, occasionally, instrumental composition.
In 18 century the sinfonie has three movements, in the tempo quick-slow-quick.
Symphonies at this time, whether for concert, opera, or church use, were not considered the major works on a program: often, as with concerti, they were divided up between other works, or drawn from suites or overtures.
Vocal music was dominant, and symphonies provided preludes, interludes, and postludes.
At the time most symphonies were relatively short, lasting between 10 and 20 minutes. The early three-movement form was eventually replaced by a four-movement layout which was dominant in the latter part of the 18th century and most of the 19th century.
The last unmeasured preludes for harpsichord date from the 1710s.
Prelude in the 17 century in Germany led to a sectional form similar to keyboard toccatas Johann Jakob Froberger or Girolamo Frescobaldi.It is this form that is often considered as the direct forerunner of the orchestral symphony.The terms “overture”, “symphony” and “sinfonia” were widely regarded as interchangeable for much of the 18th century.Overture also referred to collections of movements, known as suites. A sinfonie is a musical composition, the extended and used for orchestra. There are sinfonies that are tonal works in four movements with the first in sonata form, and it is often described by music theorists as the structure of a classical (reference.com) sinfonie.Evolution of Prelude The very first preludes were lute compositions of the Renaissance era.A prelude is a piece of music which is short; it has no particular introduction to succeeding movements of a work that are usually longer and more complex.It features single rhythmic and melodic motif that is used in every measure throughout the piece.The slow introduction was always repeated, and sometimes the quick movement concluded by returning to the slow tempo, (1911encyclopedia.org) usually with new motivic material but occasionally recapitulating the opening, and this combined fast-slow material was sometimes also repeated.The operatic French ouverture was frequently followed by a series of dance tunes before the curtain rose. (1911encyclopedia.org) Bach was able to use the French ouverture form for choruses, and even for the treatment of chorales.Outside Germany, Abraham van den Kerckhoven (c.1618-c.1701), one of the most important Dutch composers of the period, used this model for some of his preludes.Southern and central German composers did not follow the sectional model and their preludes remained improvisational in character with little or no strict counterpoint. 25 (1921/23), both of which begin with an introductory prelude. 39; each one cycles through all of the major keys of the piano.