Re: seq2test.ny sequencer plug-in

Hi,

Just because I disagreed with some of Paul's points didn't
mean I
had to be sarcastic in my response to him. I apologize to
Paul and
to the Audacity-Nyquist community in general.

I have been thinking about Paul's comments about using the
Pythagorean scale he spoke of. It is possible to enter
floating-
point values for semitone values into seq2test.ny. At the
moment
though, it is not possible to enter LISP math expressions to
create
semitone values. This will be my next step in evolving
seq2test.ny.

If I understand these ratios correctly, using his example of
one of
the tone ratios 9/8, to convert this to proper semitone
value for
the sequencer, the LISP code would be

(- (* 12.0 (/ 9 8)) 12)

which equals a semitone value of 1.5. This can be done with
the
other ratios.

I will be editing seq2test.ny to allow users to enter LISP
math
expressions to allow entering such calculations, rather
than
calculating elsewhere and entering the values by hand.

Thanks

David

-- 
David R. Sky
http://www.shell
world.net/~davidsky/


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Hi again,

I believe my math belowis incorrect - the ratios are
frequency rations not 
semitone value ratios. So if A was the tonie 440hz, the 9/8
ratio would 
bey 9/8 times 440.

I hope this is correct

David

-- 
David R. Sky
http://www.shell
world.net/~davidsky/


On Sun, 2 Sep 2007, David R. Sky wrote:

> Hi,
>
> I have been thinking about Paul's comments about using
the
> Pythagorean scale he spoke of. It is possible to enter
floating-
> point values for semitone values into seq2test.ny. At
the moment
> though, it is not possible to enter LISP math
expressions to create
> semitone values. This will be my next step in evolving
seq2test.ny.
>
> If I understand these ratios correctly, using his
example of one of
> the tone ratios 9/8, to convert this to proper semitone
value for
> the sequencer, the LISP code would be
>
> (- (* 12.0 (/ 9 8)) 12)
>
> which equals a semitone value of 1.5. This can be done
with the
> other ratios.
>
> I will be editing seq2test.ny to allow users to enter
LISP math
> expressions to allow entering such calculations, rather
than
> calculating elsewhere and entering the values by hand.
>
> Thanks
>
> David
>
>

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