This post arises from a collection of random notes in my Thinking Book and conversations on social media, none of which were substantial enough to make a post of their own, but would if bundled together. So, a bit of a miscellany, but at least a themed one.
Vocables are the nonsense/neutral sysllables we use in a cappella to create accompanying textures. They are sometimes intended to evoke instrumental textures explicitly, but they’re often simply about creating a distinctive expressive profile for a song and providing expressive variety over the course of the musical narrative.
Change vocable when you change pattern
One of the things that takes up an awful lot of rehearsal time when working with human beings, especially human beings who work in idioms that involve memorising music, is handling the bits where a pattern changes. You set up a riff, and then some pesky musical detail like how the melody goes or a change in chord means you have to mess with it – in the process, messing with the singers’ heads just as they’d got settled into their stride.