Thirty-First English
Trigesima Prima Italian

Despite being listed in three different stop dictionaries, this is not an independent stop, being much too high-pitched, but is a rank found in mixtures. Its pitch is 2/5' when reinforcing the 8' harmonic series, and 4/5' when reinforcing the 16' harmonic series. Irwin claims that this rank sounds �four octaves and a third above the keys depressed ... at the approximate pitch of the twentieth harmonic�. Irwin has it backwards. This rank, if it is to be of any use at all, must sound at exactly the 20th harmonic, which is only approximately four octaves and a third above the fundamental.

See also Mutations.


Audsley[1]: Thirty-First. Audsley[2]: I.XIII Thirty-First. Irwin[1]: Thirty-First. Wedgwood[1]: Trigesima-prima.
Original website compiled by Edward L. Stauff. For educational use only.
ThirtyFirst.html - Last updated 31 December 2000.
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