Medieval Term for Range of Pitches in a Piece

This page is the CodyCross answer for the clue below from A Sweet Life, Group 1096, Puzzle 1 (Holding Hands).

Question is: Medieval Term for Range of Pitches in a Piece

and the answer is: AMBITUS

Word Meaning:

AMBITUS — (music) The range of a melody, especially those of ecclesiastical chants.

Definitions from Wiktionary.