The Nocturne Number 1 in E minor, Opus 72 is a musical work composed by Frédéric Chopin in the early 19th century. In 2377, Seven of Nine played the piece on the piano on the holodeck when experimenting with her Humanity. (VOY: "Human Error") * Listen to Seven play Chopin's Nocturne Op. 72 No. 1file info According to the Star Trek Encyclopedia (4th ed., vol. 2, p. 85) , this composition was written by Chopin in 1827.