Start with an integer A with lots of factors, typically a primorial. Consider the families primes of the form A*t+B, where B is relatively prime to A and 0<B<A.

Assign each family a musical note, and sound the note for each value of t that there is a prime. The value of t represents time. If there are many Bs for a given t that are prime, then a chord will sound. Using a pentatonic scale avoids dissonance.

Speed up time logarithmically to compensate for the primes thinning out.

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