There are many "moments" in music that can be considered magical. But if you get down to a magical "note" or two, I must say these: 1) The chords accompanying Desdemona saying farewell to Emilia and her high A-flat note after that in Act IV, Verdi's Otello. 2) The end of 1st movement development, Schubert's Sonata #21. --Tim Hu