The opening section of sinfonia for strings and continuo from handel's messiah start with<u> Basso Continuo.</u>
The basso continuo has the effect of emphasizing the bass part, its usually played with a keyboard instrument and an instrument such as a cello or bassoon, and they keyboard player improvises chords following written numbers above the bass part.
The bass section of a baroque accompaniment is typically played by two instruments: a keyboard instrument, like an organ or harpsichord, and a low, melodic instrument, like a cello or bassoon.
In music, the term "basso continuo" refers to a system of somewhat improvisational accompaniment performed on a bass line, typically on a keyboard instrument.
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