Opening measures of Chopin's "wrong note" etude Op. 25 No. 5, demonstrating a humorous use of the minor second. The original work is public domain, image created by the uploader.
Sergei Rachmaninoff performing Waltz in E flat major, Op. 18. Composer: Chopin. Instrument: Steinway concert grand piano. Valse en mi bémol majeur, op. 18 de Chopin, interprétée sur un grand piano Steinway par Sergei Rachmaninoff en 1921.