" The music in my heart i bore " . Whixh music is William Wordsworth talking about? Why does he bore it in his heart?

The poet could not comprehend the meaning of the song which the solitary reaper was singing as it was in Spanish. However, it was so heart rendering that even its melancholic tune touched him deeply, so deeply that even after he left the Highland, he kept recalling the song to himself. This was obviously because of the lament which the song's tune had as well as the melody with which she was singing the song.