In this last suite, which is also the longest, Bach makes the instrument ascend to heaven. He does so by using an extra fifth string – ‘a cinq cordes’, as Anna Magdalena Bach described it in the manuscript. The fifth string lies a fifth above the A string, which is usually the highest. You might even argue that Bach allows the cellist to transcend their own instrument.
Recorded for All of Bach, a project by the Netherlands Bach Society.