Prelude I ... Danseuses de Delphes, Claude Debussy

The prelude begins with a harmonic progression in B flat major ending over a dominant chord (measures 1 to 5):

The thematic material as an internal voice (in blue) appears. A dominant pedal is in measures 3 to 4 (in red):

Measures 1 to 5:

Nichole Muller, piano. Courtesy of Piano Society.

The passage is repeated. The melody is doubled at the octave, and syncopated chords added:

Nichole Muller, piano. Courtesy of Piano Society.