I spent last weekend with Fascinating Rhythm near Bristol for their chorus retreat. Their director, Jo Dean, has been with them two years, and they are at that productive point where they have settled into a secure working relationship, but not into a rut. Indeed, one of the minor themes of the weekend was helping Jo feel safe to keep a lighter grip on the reins now that she is getting a more immediate and nuanced response from the singers – several gestures that were needed when the chorus was first learning to read her can now be reduced and/or dropped entirely.
One major theme that emerged was that many aspects of the way you deliver a performance are contingent rather that fully definable in advance. If one part leads into a phrase, the other parts need to respond to the vocal tone they use that particular occasion, for instance. Likewise, the length of a grand pause depends on the energy and manner of release of the sound that precedes it. Come back in too soon and the audience won’t be ready for you; leave it too long and their attention will wander; gauge it right and they will meet you at the start of the next phrase.