Extensio
Extensio ('expansion'; from Latin extendere ' to spread, to expand') is described as a musical figure primarily by Christoph Bernhard (1628–1692) and Johann Gottfried Walther (1684–1748) as “… a change that lasts for a long time [...] ”and means a long lasting dissonance sound.
The extensio is the lengthening of a dissonant sound with the help of a multiplicatio , which extends or lengthens a passage or syncope .
For C. Bernhard, the extensio is one of the figures of the stylus theatralis (also called stylus recitativus by him ). In it, the use of dissonances is kept free, as the singing part is only accompanied by a basso continuo , so other voices have no influence on it.
Sources and literature (chronological)
- Christoph Bernhard: Tractatus compositionis augmentatus . Ms. ( online edition Bernhard Lang) .
- Johann Gottfried Walther: Musical Lexicon. Deer, Leipzig 1732 ( archive.org ).
- Dietrich Bartel: Handbook of musical figure theory . 4th rev. Ed., Laaber-Verlag, Laaber 1997, ISBN 3-89007-340-9 .