secor's organ (was: Re: 665-tone equal temperament)

for what it's worth, george described the organ in question
as "digitally tuned" (and made some other interesting observations
everyone should reread):

/tuning/topicId_37831.html#38014

--- In tuning@yahoogroups.com, "Paul Erlich" <perlich@a...> wrote:
> --- In tuning@yahoogroups.com, "Dave Keenan" <D.KEENAN@U...> wrote:
>
> > and I would be very surprised to learn
> > that an analog frequency divider had _ever_ been used in an
> electronic
> > musical instrument.
>
> what about jimi hendrix's octavia pedal?
>
> > I would also be surprised to learn that any (predominantly) analog
> > synthesizer ever contained _any_ kind of frequency divider for the
> > purpose of generating the pitches of the keys. In an analog
> > synthesizer the pressing of each key causes a different voltage
(or
> > current or other continuous electrical quantity) to be sent to the
> > oscillator to tell it what frequency is required. They are
> generally a
> > one-key-at-a-time instrument, although there were split keyboard
> > models. The degree of polyphony added in the later models was
> > generally in direct proportion to the degree of digital (and in
> > particular microprocessor) electronics that they contained.
>
> i don't think secor's subharmonic series organ, which was of course
> polyphonic, followed the larger trends of electronic keyboard
> manufacturing in any way. but i should review his post 3xxxx to see
> if he gave any details on this . . .

--- In tuning@yahoogroups.com, "Paul Erlich" <perlich@a...> wrote:
> for what it's worth, george described the organ in question
> as "digitally tuned" (and made some other interesting observations
> everyone should reread):
>
> /tuning/topicId_37831.html#38014
>
> --- In tuning@yahoogroups.com, "Paul Erlich" <perlich@a...> wrote:
> > --- In tuning@yahoogroups.com, "Dave Keenan" <D.KEENAN@U...> wrote:
> >
> > > and I would be very surprised to learn
> > > that an analog frequency divider had _ever_ been used in an
> > electronic
> > > musical instrument.
> >
> > what about jimi hendrix's octavia pedal?

This is in fact an analog frequency _multiplier_, not divider,
specifically a doubler, using full-wave rectification. I've built one
of those too.

But I stand corrected by Kurt Bigler on the "analog" dividers used for
octave division (but not top-octave division) in the Baldwin organs.

Paul, I can't find the post in which your "octavia" question
originally occurred. I'm concerned I may have missed something else there.

--- In tuning@yahoogroups.com, "Dave Keenan" <D.KEENAN@U...> wrote:
> --- In tuning@yahoogroups.com, "Paul Erlich" <perlich@a...> wrote:
> > for what it's worth, george described the organ in question
> > as "digitally tuned" (and made some other interesting
observations
> > everyone should reread):
> >
> > /tuning/topicId_37831.html#38014
> >
> > --- In tuning@yahoogroups.com, "Paul Erlich" <perlich@a...>
wrote:
> > > --- In tuning@yahoogroups.com, "Dave Keenan" <D.KEENAN@U...>
wrote:
> > >
> > > > and I would be very surprised to learn
> > > > that an analog frequency divider had _ever_ been used in an
> > > electronic
> > > > musical instrument.
> > >
> > > what about jimi hendrix's octavia pedal?
>
> This is in fact an analog frequency _multiplier_, not divider,
> specifically a doubler, using full-wave rectification. I've built
one
> of those too.

whoops! the vast majority of octave pedals _divide_ the frequency by
two, so i assumed this was one of them, and a "pre-digital" one at
that.