[Aidevah]

> “Almost all music is written with a strong melody line,” she said. “We call that the lead line. Then, the three parts that harmonize with that, usually they are written just to harmonize. And they do. With this dispersed music, each line is a tune unto itself. It is not written just to harmonize with the lead. It's a tune unto itself. That's why they call it dispersed harmony.”

> The light came on. Four separate melodies, sung simultaneously. Four different songs, really, but each with the same words. Which makes it an even more welcoming tradition than the one I grew up with. If you don’t like the treble line of a song that much, then sing one of the other three. Nobody cares.

This is of course more commonly known as "polyphony". Written sources of polyphony in western sacred music survive from at least the 12th century AD, and the unwritten practice must go back even further. Polyphony has been a inseparable, and some may even say distinguishing feature of western (literate) music ever since. It seems that the author and her interviewee are somewhat insulated from the mainstream of western music to be unaware of this.