JS Bach's Preludes and Fugues

The harpsichordist Mahan Esfahani plays JS Bach's Sonata in D minor, BWV964; 'The Well-Tempered Clavier', Book I; Prelude and Fugue No 19 in A, BWV864; No 21 in B flat, BWV866; Prelude and Fugue No 24 in B minor, BWV869; and Partita V in G, BWV829.