problem:
if you have a bunch of machines go off in the same tick (common scenario) all their sounds go off in the same instant, creating making one extremely loud noise
solution:
add small random variation in sounds

problem:
20 of a similar sound with small random variation comes off as horrible static
solution:
cluster similar sounds by position and type, and then only play 1 sound for the nearest 3 clusters (tinted cyan in this debug view)