What does 'Cantabile' signify in musical performance?

The term 'Cantabile' is derived from the Italian word for 'singable' and is used in musical performance to indicate that a piece should be played or sung in a lyrical, flowing manner that emulates the qualities of the human voice. When a performer sees 'Cantabile' in sheet music, it suggests that they should adopt a smooth and expressive style, similar to how one might sing a melody. This approach enhances the musical line, allowing for emotional expression and a graceful delivery that mimics vocal techniques, making the music more engaging.

While other terms in musical vocabulary convey different nuances of expression and style—such as vigor and spirit or grace—'Cantabile' specifically emphasizes the importance of a melodic, singing quality in performance. This is why the choice highlighting the singing style is the most accurate interpretation of what 'Cantabile' signifies.