It is based on that precept. You could I suppose argue that hearing a horn somewhere in the ground triggers the impulsion to play it yourself, which triggers the impulse in someone else, which triggers...
Anyway, it took my mind off the horns for a while.
But overall, the point was that you don't have to be playing it anywhere near the whole time for the whole ground to be drowned out. Just five minutes' playing for fun means 2500 or so horns on the go at any one time.
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