Converting frequencies to notes
oakcroft13
bill at h...
Fri Jul 12 17:54:14 BST 2002
Steve Ivin:
> (Thorough and well argued post)
> But I'm not sure why we need a Spreadsheet when a
> cheap calculator can be used
For what it's worth, I use cents = 1731.234 loge(f2 / f1), I have
found the constant very memorable.
The point behind the spreadsheet (and how I regret ever offering it
for public consumption, I thought it might be useful!) was to sort
out the detail of an algorithm that could be coded to produce, via
lookup tables, a text string for screen display in a program. It was
more difficult than I expected, due to the need to deal with rounding
errors.
Though Steve is right that the conversion is easily done with a
calculator, I have found translating a complete set of partial
frequencies (such as Christopher Dalton commonly gives) involving two
or three dozen notes, quite a chore by hand. I end up counting
semitones on my fingers! These days, I always do these conversions by
spreadsheet.
Bill H
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