Tu Conga Bach (conga); Fuga (Sonata in D Minor, BVW. 964, Fuga-Allegro, cha-cha-cha); Air on a G String (bolero); Clave in C Minor (Prelude No. 2 in C Minor, guaguanco); Gavotte from French Suite No.

In a lesser composer's hands, this might have sounded a bit mathematical, mechanical and boring – but not with Bach! This is especially evident in the Toccata and Fugue in D minor. It's written ...