>>>>
Say I have a 310 uVCO and a 300, can I run the output of the 310 into
the "hard sync" jack on the 300? If so, the CV going into the 310
controls the pitch, whereas the CV going into the 300 only controls
the timbre of the sound? (they could both track the main CV i'm
playing with the coarse adjustment on the 300 set to give me a
specific sound)
<<<<
You have the right idea. To do the classic 'hard sync' sounds, be
sure and run the 300 at higher frequencies than the 310 (using your
patch example). Use a pulse wave output from the 310 to connect to
the 300's sync input.
>>>>
The resonant sound, naer sine wave, of the filter ∗tracking∗ the
harmonic content of the source wave. So, say if this patch were set
with no oscillator, and the filter self oscillating, you'd here a
continuous pitch shift. That's not what I want. With the oscillator
going, I'm looking for that resonant peak to follow the content of
the wave... so what you hear as the filter's cutoff increases, is the
resonant sound "jumping" from one frequency to another.
<<<<
I just patched up both a MOTM-420 and a MOTM-440 to check this, and
was able to get the 'jumping harmonic series' effect with either one.
The 440 sounds more pure, the 420 more buzzy. The secret is adjusting
the resonance to just BELOW hard oscillation. Also remember that
there is a certain range (starting from the fundamental VCO frequency
and moving upward through the first 10 harmonics or so) that the
harmonics of the VCO are far enough apart so that this effect is
pronounced. As you sweep further and further up into the high
harmonics, they become so close together in frequency that the effect
disappears, and it sounds continuous instead of stepped.
Moe