Suboctave generator - 4013?

[harry]

This is a REALLY good suggestion.  I'd do divide by three and six...
Its possible to do pulse doubling from a square and get a divide by 3/2
which is a fourth down.

On this subject... a G is a fourth DOWN from C... but a G is the fifth scale
step of the key of C.  So be careful... our suboctaves will generate the note
"G" !

This will sound like Keith Emerson  playing stuff from "Tarkus" which is
fine by me !!!

H^) harry

Jim Patchell wrote:

>     Sounds good to me....If you want to fool around, you might want to add a
> divide by 3 as well, this will produce a tone down and octave and a fifth (I
> think???), but, as I recall, division by 3 is musically useful.  I can't
> remember if the 4013 is a JK flip flop or a D flip flop.  You an make a divide
> by 3 very easily with a JK flip flop.
>
>     -Jim
>
> DCMagnuson at aol.com wrote:
>
> > Hi List,
> >
> > I'm designing an outboard second voice for an SH-101, and I'm fooing around
> > with VCO designs.  I want to add the suboctaves to the new VCO, like there
> > are on the original VCO.
> >
> > The SH-101 uses a 4013 to derive it's suboctaves.  The 4013 is driven from
> > the Saw wave, and creates pulse waves 1 and 2 octaves down.  By mixing the
> > two they also create a 2 octave down pulse w/ ~25% duty cycle.
> >
> > Is this a good method of creating sub octaves, or is there a better circuit
> > to use?  I like the extremely low parts count of the 101's design, but I
> > don't know if it's a "good" method, or just a "cheap" method that will be
> > compromised in quality.
> >
> > Anyone use 4013-based sub octave generators in their designs?  Drawbacks?
> > Limitations?
> >
> > Thanks in advance
> > Dave Magnuson