The 40-part challenge

Embedded somewhere in the Christmas story no doubt is the idea of much being contained in a small space — or Multum in parvo as the restored road signs leading into Rutland have it. The opposite, which I will leave you to chisel into Latin for yourselves, presumably gets less attention in the Bible, yet nicely sets up any discussion of the current interest in writing choral music for 40 voices.

A performance of any 40-part piece is likely to guarantee a big crowd. Like dinosaurs, they attract attention merely on account of their size, though unlike these forebears they need a quite exceptionally large brain to control their bulk. The problem for the composer is obvious: how to make something interesting of such a massive canvas. Most of us can hum a good tune; some more talented can even imagine the possibility of two or three tunes going on at the same time.