Deriving notes from given (fundamental) frequencies.
1  noteFromFF(x, diapason = 440, roundshift = 0)

x 
Fundamental frequency. 
diapason 
Frequency of diapason a, default is 440 (Hertz). 
roundshift 
Shift that indicates from here to round to the next integer (note).
The default (0) is “classical” rounding as described in Example: if 
The formula used is simply round(12 * log(x / diapason, 2) + roundshift)
.
An integer representing the (rounded) difference in halftones from diapason a,
i.e. indicating the note that corresponds to fundamental frequency x
given the value of diapason
.
For example: 0 indicates diapason a, 3: c', 12: a', ...
Uwe Ligges ligges@statistik.tudortmund.de
FF
, periodogram
, and tuneR for a very complete example.
Questions? Problems? Suggestions? Tweet to @rdrrHQ or email at ian@mutexlabs.com.
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