Études op. 25, No. 5 in E minor
This image appears in the gallery:
Lang Lang: The Chopin Album - an album guide
5. Études op. 25, No. 5 in E minor
It's one of Chopin's more technical study-style études, notable for its quick bursts of clashing notes throughout the music. Perhaps unsurprisingly, it's known as the 'Wrong Note' étude.