musica recta
Quick Summary
Musica recta refers to the notes that were part of the original musical scale authorized by Guido d'Arezzo in the 11th century. It is the opposite of musica ficta, which involved notes outside this authorized scale.1
While musica ficta was sometimes used in sacred music like Gregorian chant, it was more common in secular monophony and polyphony, particularly from the 13th century onward. Performers often added accidentals (flats, sharps, or natural signs) not notated in the original music for reasons of euphony or to create a stronger sense of musical motion. This practice influenced the development of Western art music and the later system of tonality.12
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