Each note is greater or lesser than its neighbour in frequency by the twelfth root of two times its neighbour's frequency.

F2 = F1(2^1/12)) or F2 = F1/(2^1/12))

Similarly L2 = L1(SQRT(2^1/12)) or L2 = L1/(SQRT(2^1/12))

THIS BIT IS IMPORTANT FOR THIS REASON:

If you have a given length of tubing, or a bunch of tubes of various lengths, you may want to just use them as efficiently as possible (i.

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