Étude Op. 25, No. 8 (Chopin)

Étude Op. 25, No. 8, in D-flat major, is a technical piano study composed by Frédéric Chopin.

Étude Op. 25, No. 8 is a composition in D-flat major, employing notes related as sixths throughout the piece. Two examples in the opening of sixth intervals are A-flat to F and G-flat to E-flat. Chopin composed this etude with sixth-note intervals to be played with both hands.

This etude is composed with sixths being played in both hands. The technical skill required to play it makes this etude one of the most difficult in Op.25. Its unusual sound is due to the uninterrupted succession of ascending, descending and chromatic sixths. It is written in, but not in time.