Frequency Math

[Joost Schuttelaar]

On Oct 10, 2008, at 20:31 , Martin Naef wrote:

> 431.942, if I got the math right...
>
> That would be: 440 * 2 ^ (offset/(12*100)), assuming that 12 notes  
> is an
> octave (which is half/double the frequency) and each note is divided
> into 100 cents.

Yep! Correct.

float semitonesToFreq(float s) {
	return 440.0 * pow(2, ((s - 69.0) / 12.0));
}

:)

-- 

Joost Schuttelaar
The Hague, NL