As it is not clear which instrument Bach had in mind, Shunske Sato made his own instrumentation for the Netherlands Bach Society. “I wanted to bring out the many colours of the work and of my ensemble. Every fugue has its own character. On the basis of the rhythm, time and chromatic lines, etc., you can determine which instrument is most suitable. I’ve studied each part very carefully, in order to decide which instruments are best to use. I wanted the whole Netherlands Bach Society to be heard, so the singers are taking part as well. They sing without words, to vowel sounds.”
via: YouTube