The interval between E and A is a fifth, but it’s upside down, because we’re going down a fifth from E. In music theory terms, an upside down fifth is called a fourth. You go up a fourth by multiplying your frequency by 4/3 (it’s 3/2 upside down, doubled to bring it up an octave.) So your A string is now tuned to 4/3 Hz.
commerce. To some, this is a loss. Cash represented a certain freedom from
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but not also make too many governments mad.