2 modules ideas

[Paul Maddox]

MB,

> I think that the driving oscillator would need to be a very high frequency
> oscillator, for this module to be very useful.  For instance, if you plan
to
> derive your lowest harmonic by dividing by 16, you would need a driving
> oscillator that could accurately track CV at 16 times the frequency of a
> "normal" VCO.  (normal VCO:  10 Hz to at least 10 kHz, high-frequency VCO:
> 160 Hz to at least 160 kHz)
>

checkout my modulus page, I did a high speed VCO drives a 128byte waveform
lookup table :-)
Uses LM13700 (IIRC).


> What about using a
> Phase-Locked-Loop following a "normal" VCO to generate the high-frequency
> clock?  (loop error, overshoot, and delayed response might be
problematic..I
> don't know)
>

no can do, too slow (undershoot) or too quick (overshoot) as soon as you
change pitch
by more than an octave you'd have to recalibrate it again.

>
> P.S. - I think that this module should also have musical intervals other
than
> just octaves, such as fifths and thirds, etc.  It would be really great if
> you could duplicate the entire natural harmonic series, up to about the
ninth
> or tenth harmonic.

take a look at walsh functions.. check out Tonys page..
These dont just use even harmonics..

Paul Maddox