Definition von musica ficta im Englisch Englisch wörterbuch
the use of chromatically altered tones in the contrapuntal music of the 10th to the 16th centuries
(Latin; "feigned music") In medieval and Renaissance music, the practice of inserting unnotated chromatic notes (see chromaticism) during performances. According to treatises of the times, it was left to the performers to "correct" certain intervals. Which intervals were to be changed, and how and under what circumstances, varied over time. This practice was responsible for the introduction of accidentals (sharps, flats, naturals) into musical notation. It also influenced the evolution of the major and minor keys on which most Western music came to be based, for it modified the medieval church modes to resemble the major and minor scales