A symphony is an orchestral composition with several succeeding movements or parts.During the Classical era, symphonies were often composed of four movements, each having its own speed and atmosphere.
One of the most influential periods in the history of orchestration is the Classical era, which generally spans the second half of the 18th century. Mozart and Haydn were the two most gifted musicians of this time. Many important developments took place during this time. The orchestra became standardized String instruments (first and second violins, violas, violoncellos, and double basses), two flutes, two oboes, two clarinets, two bassoons, two or four horns, two trumpets, and two timpani eventually made up the classical orchestra.In the final works of his career, the London Symphonies, Haydn made a permanent alteration by including clarinets in the woodwind section.
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