MOTM

h3y all,
i'm playin' with the lfo and this is way beyond my scope of 
comprehension.  
 1st, the vco is set to coarse=4, fine=3. (with this, the pitch is 
set about 50 cents higher than A=440)  width=5, PWM=10.  pulse out to 
vca. triangle out to lfo FM.  
 2nd, lfo settin's:  rate=10, FM= +5, shape=0
sine from the lfo is plugged into the PWM on the vco.
 3rd, EG sustain=7, attack, decay, release=o
last, vca gain=0, cvmod=10
 by depressin' a C on the keyboard, i get an lfo cycle of what looks 
like 5sec. (but i have by careful tweakin' gotten it up to 20 sec)  
however, unlike a slow rate where the LED is green, then red, then 
gree... etc.  this has a dominant LED for about half the period with 
the other faded, but still lit in the background.  as it works 
through what sorta looks like a normal slow cycle they switch 
intensities.  so the one that was dim is bright and vice versa.  
  on to the sound,  as i travel chromatically up the keyboard from C, 
the lfo cycles get faster until G#, from A up they start to slow 
down.  at an octave above C, the cycle is about 1 sec. this pattern 
repeats for a couple of octaves(in increasin'ly faster increments) 
until the lfo cycle is continuously full blast across the rest of the 
range up.
 i have uploaded this to the files section if you want to hear it.
all i can think is that the frequencies are "harmonically aligned" 
(for lack of a better term) with the lfo modulation rate(via the tri 
in from the vco) and therfore in sync(-ish).  as i move away from the 
frequency(C note in my case)that i dialed in, it starts to do what????
   i am utterly baffled, and not sure i am even on the right track to 
the solution.  any help would be appreciated.  i would love to know 
what i have done...
peace,
doc