[sdiy] Black Magic oscillator cans

[Tim Ressel]

Theo,

Nope. the interval multiplier is the 12th root of 2,
or 1.0594631. Now multiplying a note by 1.0594631 is
the same as adding (note*0.0594631) to the note. And
0.0594631=5.94631%. So there about 6% ratio between
semitones.

--tr


--- Theo <t.hogers at home.nl> wrote:
> Err, how should I interpret these percentages then, 
> I thought that 100% error was a semitone.
> 
> Theo
> 
> ----- Original Message ----- 
> From: Ingo Debus <debus at cityweb.de>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Tuesday, July 22, 2003 2:19 PM
> Subject: Re: [sdiy] Black Magic oscillator cans
> 
> 
> > Tim Ressel wrote:
> > > Ingo,
> > > 
> > > I ran the numbers on my trusty MICROSOFT
> spreadsheet
> > > and got the following maximum errors:
> > > 
> > > 2.00024MHz:  +0.069%, -0.0689%
> > > 2.00000MHz:  +0.057%, -0.0809%
> > 
> > Oooops! Ack! Stupid me!!!
> > Before I wrote that last mail I just had a quick
> glance at an old 
> > Elektor article desribing that TOS chip. They
> listed the relative 
> > errors, and I didn't realise that this was already
> in percents. So the 
> > listed value of 0.07 is really 0.07%, and not 7%,
> as I thought. 
> > Thinking of it, 7% frequency error is more than a
> semitone %-)
> > 
> > Sorry for the confusion.
> > 
> > Ingo
> > 
> > 


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