Music (Wikimedia Commons): Satie, Gymnopédie No. 1, Michael Laucke (public domain). Bach, Air, US Air Force Strings (public domain). Saint-Saëns, The Swan, Judith Bokor (public domain). Chopin, Nocturne Op. 9 No. 2, Frank Levy (public domain). Bach, Prelude in C, Kimiko Ishizaka (public domain). Debussy, Clair de lune, piano by eldüendesüarez, CC BY-SA 4.0.