I started out with the ratio, 80/78 = 1.02564102564103 ~= 43.11 cents
78/76 = 1.02631578947368 ~=44.24 cents
35/33 = 1.06060606060606 ~= 102 cents
It is the ratio that is important, not the absolute step.
On 2017-04-24 5:04 PM, Maddie Dietrich wrote:
> So, is there a separate logarithmic relationship accounting for...um, I
> guess the rpm to pitch, but also accounting for what the rpm is. Easier to
> give an example:
> Say the pitch difference (the resulting interval in pitch) between 78 rpm
> to 80 rpm is 44 cents.
> Is the pitch difference between 76 to 78 *corrected* also 44 cents? Or would it be
> less? or more? My hunch is that it would be less. And between say 70 and 72
> even less. But between 80 and 82 would be a bit more than 44 cents. And
> between 90 and 92 even more. Or maybe it's the opposite?
> Stated more simply, the lower the in rpm, the smaller the pitch interval
> resulting from a constant differential (say, 2 rpms), and the higher the
> rpm, the larger the interval.
> Or maybe the opposite? Or maybe it's a constant? Am I saying this right?
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada 647 479 2800
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