Figured Bass
Also known as: Thoroughbass
Baroque-era shorthand notation system using numerals beneath a bass line to indicate harmonic realization, foundational to Baroque ensemble practice.
Figured Bass (also Thoroughbass or basso continuo) is the Baroque-era shorthand notation system using Arabic numerals, sharps, flats, and naturals beneath a written bass line to indicate the harmonic intervals to be realized above. A keyboard or lute player reading figured bass would improvise the chordal accompaniment in performance, providing the harmonic and rhythmic foundation for the ensemble. The practice originated in late 16th-century Italian church music — Lodovico Viadana's Cento Concerti Ecclesiastici (1602) is the conventional landmark — and was systematized through Baroque-era treatises by Banchieri, Heinichen, Mattheson, and C.P.E. Bach (Versuch über die wahre Art das Clavier zu spielen 1753-1762). Figured bass was the central pedagogical tool of Baroque keyboard training and the foundation of Baroque ensemble practice; its decline through the mid-18th century paralleled the rise of Classical-style notated accompaniments. The inversion notation in modern Roman numeral analysis (6, 6/4, 7, 6/5, 4/3, 4/2) descends directly from figured-bass conventions.
Core components
- Numerals indicating intervals above the bass note (3, 5, 6, 7, 9, etc.)
- Default chord assumption (root-position triad if no figure given)
- Accidentals (♯, ♭, ♮) indicating chromatic alterations of figures
- Slashed numerals for chromatic alteration of the indicated interval
- Compound figures (6/4, 7, 6/5, 4/3, 4/2) for inversions and seventh chords
- Tasto solo (bass alone) indication
- Figured-bass realization conventions including voice-leading principles, doubling, and stylistic ornament
- Distinction between figured bass (compositional) and unfigured bass (performance-tradition realization)
Primary use case
Foundational notation and pedagogical system for Baroque keyboard improvisation and ensemble accompaniment c.1600-1750; central tool in historically-informed performance of Baroque music; pedagogical foundation in early Baroque-style composition study; analytical reference for Baroque harmonic practice in music-theory and musicology research; intellectual precursor and notational foundation for modern Roman numeral analysis inversion notation.
Common criticisms
- Figured bass realization is substantially under-determined by the figures alone — voicing, doubling, ornamentation, and rhythmic placement require performance-tradition knowledge not encoded in the figures, producing ongoing scholarly debate about authentic realization (notable work by Peter Williams, George Houle, Robert Donington, and Tharald Borgir on Baroque performance practice)
- the practice is historically bounded — applying figured-bass thinking to repertoire outside c.1600-1750 produces analytical anachronism
- figured-bass pedagogy has declined in modern conservatory training despite advocacy from historically-informed-performance specialists, creating a competence gap in keyboard players approaching Baroque repertoire
- the notation does not commit to chord-root identity, which is an analytical limitation when chord-rooted analysis (Roman numeral, functional) is the goal — an issue Rameau's fundamental-bass theory was explicitly designed to address
- figured-bass realizations preserved by various Baroque composers (J.S. Bach, Telemann) sometimes contradict the rules later codified by their contemporaries, raising questions about the uniformity of Baroque practice.
Lineage
- Parent of
- Roman Numeral Analysis
- Siblings
- Tonal Harmony, Voice Leading Rules