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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)
16 configurations given, 12 keys pointed to. Thus frequencies don't match. Hyacinth (talk) 02:28, 8 December 2012 (UTC)
Fixed. Hyacinth (talk) 15:25, 16 August 2014 (UTC)
