The music is sad. Osborne calls these expressive qualities. Only feelings and moods, not emotions, can be ascribed to non-representational works of art or other expressive objects. Nobody ascribes sexual jealousy to works of art though a work may express feelings which are characteristic of that emotion. You cannot properly say music expresses despair since despair involves a belief that a situation is intolerable combined with a belief that you can do nothing to remedy it and only rational beings have such beliefs.
Many expressive words have dual connotation.
They describe a feeling expressed in an object and report a tendency of the object to evoke a feeling in ourselves. What a dismal room . Phenomenologically, we perceive expressive qualities in the object of attention.