The welcome recipients are school choir boys and girls who’ve just emerged from Leipzig’s St Thomas church after a concert ... But the music he left behind ensures Bach remains immortal.

Watch Arandel's Bach Evolution in the Grande Galerie de l'Évolution ... The best three will face off in the final at a concert in Leipzig's Gewandhaus.

This vivid work, which had its premiere on Good Friday 1724, brings an experimental spirit to its arresting musical dramatization of Christ’s final days.