Claire De Lune Sample  Lesson Sample by Claude Debussy. This lesson is based upon the original version of the song in they key of D flat. This is not a simplified arrangement. This song is considered an early advanced level piece so it is suitable for most third or fourth year adult students who have played consistently. The lesson includes a full demonstration at the beginning and then sections of the song are played and taught in two to four measure sections. There is more detailed instruction on unusual or more difficult passages.