Prelude in Bm, based in BWV 855a
The Bach / Siloti Prelude in B minor, is an arrangement for piano by Alexander Siloti of Johann Sebastian Bach's Prelude in E minor, BWV 855a, originally from his Klavierbüchlein für Wilhelm Friedemann Bach (the melody also appears, though in different form, in the Well Tempered Clavier). The Siloti version transposes down Bach's original from E minor to B minor, and it exchanges the roles of the hands. It also adds a repeat, allowing for a voicing change in the chords which helps emphasise their melodic conduction.