How did figured bass help musicians create accompaniment in the common practice period?

During the common practice period, figured bass (also known as basso continuo) served as a system of musical shorthand that allowed performers to create improvised accompaniments based on a written bass line.12

Rather than writing out every note of the harmony, composers provided only the bass part, often accompanied by small numbers and symbols placed above the notes. These figures acted as a guide, indicating the intervallic constitution of the chords—such as thirds, sevenths, or accidentals—relative to the bass note.12

This system offered several advantages for musicians:
* Creative Freedom: It gave keyboardists, such as organists or harpsichordists, considerable leeway to realize the harmonic implications of the music, inviting them to draw on their capacity for spontaneous improvisation.1
* Efficiency: By contracting the harmonic substance of multivoiced music into an instrumentalist’s two hands, it provided a practical way to support soloists or vocalists without requiring fully written-out parts.1
* Flexibility: Performers could manipulate the spacing of chords and add passing notes, allowing for realizations ranging from simple harmonization to complex, contrapuntal explorations.1