Bach - Prelude in B minor BWV 923 - Ogg | Netherlands Bach Society

Is this Prelude in B minor, performed by Jacques Ogg for All of Bach, actually finished? This is a crucial question when looking at this piece from Bach’s time in Köthen, just before he started as the cantor of St Thomas’s, in Leipzig. What should we make of the last 26 bars consisting only of arpeggios? Could Bach have notated this series of broken chords as a sort of sketch, in order to work out the music in more detail later? Did he decide to give free rein to the performer? Or was he just crazy about the sound effect? It’s an enigma! Jacques Ogg, harpsichordist Harpsichord: Cristofori, ca. 1710