musicalness

/ˈmjuːzɪkəlnəs/
noun
  1. The quality or state of being musical; having a pleasant sound or a talent for music.
    • The musicalness of her voice made every song she sang a delight.
    • Even simple nursery rhymes have a natural musicalness that children love.
    • Critics praised the musicalness of the composer's latest symphony.