- This article discusses the use of ambitus in the Middle Ages, for other uses, see Vocal range
Ambitus is a Latin term literally meaning "the going round", and in Medieval Latin means the "course" of a melodic line, most usually referring to the range of scale degrees attributed to a given mode, particularly in Gregorian chant. It may also refer to the range of a voice, instrument, or piece generally (Powers 2001). In Gregorian chant specifically, the ambitus is the range, or the distance between the highest and lowest note. Different chants vary widely in their ambitus. Even relatively florid chants like Alleluias may have a narrow ambitus. Earlier writers termed the modal ambitus "perfect" when it was a 9th or 10th (that is, an octave plus one or two notes, either at the top or bottom), but from the late fifteenth century onward "perfect ambitus" usually meant one octave, and the ambitus was called "imperfect" when it was less, and "pluperfect" when it was more than an octave (Powers 2001).
- Powers, Harold S., Richard Sherr, and Frans Wiering. 2001. "Ambitus". The New Grove Dictionary of Music and Musicians, edited by Stanley Sadie and John Tyrrell. New York: Grove's Dictionaries.
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