Cents to Hertz

[Farrell]

"Is it possible to predict the change in inharmonicity?"

Yes.

The ratios of partials are constant. (I got that from my Verituner manual.)

Terry Farrell
  
----- Original Message ----- 
From: "Bradley M. Snook" <bsnook@pacbell.net>
To: <pianotech@ptg.org>
Sent: Wednesday, March 27, 2002 8:24 PM
Subject: Re: Cents to Hertz


> > If the note two octaves above f = 440 is 3 cents sharp, then
> > > ( f * 2^(1/12)^24  =  1760.00 )
> > > f * 2^(1/12)^24 * 2^(1/1200)^3  =  1763.052492
> 
> Thank you so much, this is perfect! I have one more question. I do not know
> if it is even possible to figure out or not, but here it goes.
> 
> I know the fundamental frequency and the amount of inharmonicity (in cents)
> for two partials. Now, if I adjust the fundamental, the inharmonicity also
> changes somewhat. Right? Is it possible to predict the change in
> inharmonicity?
> 
> Here is an example:
> E4=329.6
> 2nd partial +1.13 cents
> 4th partial at +5.91 cents
> 
> If I move E4=331.2, is it possible to predict the extra amount of
> inharmonicity? Or do I need to know more variables like string length,
> diameter, and tension?
> 
> Bradley M. Snook
>