Answer:
vocables
Explanation:
"Vocables" are not only syllables that do not have a referential meaning, but they may also refer to sounds that people utter and are meaningful for their language or culture.
However, when it comes to music, the vocables are "non-lexical" in nature. This means that they are not pertaining to particular words and how they are defined in the dictionary. Thus, they are non-referential. Rather, they are uttered in cohesion with music.
So, this explains the answer.
