Metaphysical meaning of Jubal (mbd)
Jubal, ju'-bal (Heb.)--principle of sound; source of joy; source of moral affections; source of happiness; cry of joy; jubilation; a constant stream; moral prosperity; harmony; melody; music.
Son of Lamech by his wife Adah. Jubal "was the father of all such as handle the harp and pipe"; in other words, he represents a principle of harmony, which might find expression in musical instruments. Some suppose him to have been the inventor of the harp and the mouth organ (Gen. 4:21).
Meta. The natural rhythm, harmony, and joy of life (a constant stream, music, source of joy) that are experienced when the soul radiates grace, beauty of thought and character, and comeliness (Adah, mother of Jubal), and the body is healthy and strong. (This latter is suggested in the meaning of Lamech, the name of the father of Jubal.)