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The most common hole configurations are 6, 7, 8, 9, 10, 12, 15, and 16, a space, 24, 27, 30, 32, 36, 40, 45, 48, which give the following musical notes:
The 12 pitches of the most common kind of siren disk.
from article ("Typical numbers of holes in siren disks" section)