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Published: Wednesday, 08 January 2025 at 10:07 AM


How do you cast an opera? Mostly by voice – but which voice? If you’re casting Siegmund in Wagner’s Die Walküre, you’re obviously looking for a tenor; but you would probably not approach the likes of Bryn Terfel or Juan Diego Flórez – and they would most certainly turn you down if you did. Welcome to the complex and fascinating world of voice types.

The reason is that not all tenors are the same: some sing higher than others, some can easily negotiate fast passages, some have a good deal more vocal weight.

It’s all to do with what the Germans refer to as ‘Fach’ – which means category or compartment. Voices are categorised for their inherent qualities and their suitability for particular operatic roles – though this isn’t an exact science. Singers remain individuals, and there are artists who are impossible to categorise – Maria Callas, for instance, who sang an extraordinary range of soprano roles, or that tenor extraordinaire Jonas Kaufmann.