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| | Origin of The Key |
 | | Notice the pattern: the 1 st fifth is 2x (2/3) 1, the 2 nd fifth is 2x (2/3) 2 and the 3 rd fifth is 2x (2/3) 3. |
 | | For example, because F, the 11 th fifth, is in the seventh octave its string length, (2/3) 11, must be multiplied by 2 7 in order to find the string length of the note F in the first octave. |
 | | For example, because G, the 11 th fourth, is in the fifth octave (when counting using octave #1 as the base octave), its string length, (3/4) 11, must be multiplied by 2 5 in order to find the string length of the note G in the first octave. |
| www.hornbyisland.com /MusiCircle/origin.htm (6074 words) |
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