The usual functions of instrumental sections in the orchestra of the classical era include "the woodwinds gave tone styles that differed with that of the violins and played the melody."
Some other usual functions of instrumental sections in the orchestra of the classical era include the following:
First violins usually played the melody, while the lower strings played the accompaniment.
French horns and trumpets were used to strengthen loud passages but could be played quietly to create harmonic sound.
The orchestra of the classical era was around 1750 to 1830. It usually comprises 30 to 60 players categorized under strings, woodwinds, brass, and percussion.
Hence, in this case, it is concluded that each instrumental sections in the orchestra of the classical era serve different functions.
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