Music
Frédéric Chopin, Berceuse Op. 57 in D flat major. Benno Moiseiwitsch, piano. https://www.youtube.com/watch?v=7bQWmsq3s8U Public Domain
María Teresa Carreńo García de Sena playing her composition, Little Waltz, Welte Mignon recording. https://www.youtube.com/watch?v=t3DMwE93_W4 Public Domain
Act 2 Part 4
Sound Effects
Wind:
Wind, strong, recorded by jpnien. http://freesound.org/people/jpnien/sounds/97397/ CC BY 3.0 Share Alike
Vershinin exit whistle:
Innocent whistle, recorded by tgfcoder. http://freesound.org/people/tgfcoder/sounds/146887/ CC BY 3.0 Share Alike
Door Bell:
Bells, b15, recorded by dana robinson. https://freesound.org/people/danarobinsondesignsgmailcom/sounds/377639/ CC BY 3.0 Share Alike
Troika harness bells:
Jingle Bells, recorded by Cascabeles. https://www.mysoundeffect.com/miscellaneous/ CC BY 3.0 Share Alike
Carnival Entertainers:
Party crowd, recorded by Daniel Simion. http://soundbible.com/2163-Party-Crowd.html CC BY 3.0 Share Alike
Street - spring accordion, recorded by miastodzwiekow. Polwiejska street in Poznan, Poland; young Gypsy girl accordion-player. https://freesound.org/people/miastodzwiekow/sounds/149254/ CC BY 3.0 Share
Music
Claude Debussy, Clair de Lune, from Suite Bergamasque, by Hotel Commodore Ensemble, et al. Edited by Thomas A. Edison. The Project Gutenberg eBook Audio. http://www.gutenberg.org/files/10181/10181-m/10181-m-001.mp3 Public Domain Peter Ilich Tchaikovsky, Hamlet. https://commons.wikimedia.org/wiki/Category:Ogg_files_of_music_by_Pyotr_Ilyich_Tchaikovsky / https://upload.wikimedia.org/wikipedia/commons/3/3b/Tchaikovsky-Hamlet_Op67_vs_Kosma-FeuillesMortes.ogg CC BY 3.0 Share Alike