Horatio Parker's opera "Dream-King and his love", performed at the American Symphony Orchestra, is a cantata originally written in German and has attracted much attention from everyone composers around the world, which led Horatio Parker to win first prize in a composition competition. Although there are no online recordings of “Dream-King and his love,” listening to it in person gave me a feeling of pain and desperation due to its slow pace and low tone. The piece felt as if a tragic event had happened in a person's life and it took a sudden turn and things went straight, giving the piece an anticipated optimism