Hmmm, I don't think so. The "1V/Oct" standard describes a rate of
change in pitch, not an absolute voltage per frequency. There's no
notion of "3.64V = A440". Different VCO designs will oscillate at
different pitches with zero volts at the CV inputs. You depend on an
arbitrary setting on the Coarse and Fine tune pots (which themselves
are just CV sources going to the same CV inputs) to get you to a
specific pitch.
There were various VCO scaling procedures offered to this list back
in the archives, around the time the 300 was first released. There
are sort of 2 camps, the "use a precision multimeter" camp and
the "use your ear and listen for the beats" camp. One good way to get
multiple reference octave pitches is to run a VCO into the 120, and
use the 4 suboctave outputs to tune a second VCO against.
I prefer to use my ear. It's quite a sensitive instrument if you have
a reference pitch to tune against.
Moe
--- In motm@egroups.com, "sikorsky" <vulture.squadron@s...> wrote:
> hello all,
>
> i just remembered an idea that came to me as an offshoot to that
voltage
> source module, and my question to the list is:
>
> would a fixed precision voltage source be practical for tuning
purposes - ie
> derive the reference voltage for A-440Hz, and just put it out on a
jack - to
> aid calibration of vcos you could even go as far as make up several
switch
> selectable octaves
>
> any ideas..? or does experience out there find these things
impractical /
> innaccurate..?
>
> cheers
> paul b