Hey everyone,
Curious as your technique for this? Or does it require an expansion of sorts?
I’ve tried sourcing the LFO from Osc 3, and setting it to the saw, but I couldn’t get it to sync well.
Any other methods?
Thanks!
J
hi there.
you can do some VC of the LFO’s waveshape by using it to modulate itself. end result isn’t quite a saw, but is very close.
there are two waveform outputs - triangle and square. the phase relationship of these is such that by using the square wave output of the LFO to control the LFO’s own frequency, one side of the triangle wave output becomes steeper, eventually approaching vertical. presto, a sorta rampish kind of waveform. 
here’s how i do it:
set the second mod buss up so that the LFO square wave output is patched to LFO frequency input. set the first [mod wheel] buss so that the LFO triangle output modulates something obvious, like VCO frequency. make sure you open the wheel up and maximize it’s modulation index so that the results will be obvious.
when you increase the modulation index of the second buss, you’ll hear the triangle wave gradually lose its symmetry, eventually becoming that rampish wave i describe above. another byproduct will be an apparent increase in frequency [actually a decrease in period, but that’s quibbling].
this trick works on the CP251’s LFO also.
this makes for lots of pattern fun when the LFO output is fed into the S/H on the CP251. additionally, you can use the mixer/processor on the CP251 to further modify waveshape and/or frequency of the LFO, leading your Vger into some very Buchla-like territory, bleep beepy beep.
hope this helps!
Can you do that with the CP251’s lag processor too?
hi eric, thanks for asking.
it’s not voltage controllable, but it can be used to mimic a triangle or saw when the square wave output of the LFO is patched into it.
by setting the lag values to amounts beyond the period of the LFO, things get a bit strange…hard to explain, you just have to patch it up and experiment.
interesting results when using this patch to provide a source for the 251’s s/h [using another LFO, say from a voyager or a second 251 to clock the s/h]. surprisingly complex.
imvho the vGer’s LFO is a nice alternate clock for the 251’s s/h as it has some external sync abilities which the LFO on a stock 251 does not have. like the 251’s LFO, its frequency is voltage controllable. combining subtle amounts of VC with, say; MIDI retriggering you can get lots of fun rhythmic modulations happening.
oh, btw - HAPPY NEW YEAR, fellow moogeristas!
Yeah that is definately interesting.
And you can control the Freq of that LFO to a degree.
good point, eric - when i was typing, i was just thinking about VC of the lag processor in relation to waveshaping, not altering the period of the LFO and keeping the lag time constant…
as i mentioned earlier, the lag generator doesn’t seem to work quite the way i anticipate, and when i’ve tried comparing the slewed signal to what comes out of the s/h, the results are sometimes not…err..intuitive.
on the other hand, i do think they are interesting.
and i suspect that’s why we love these critters so much.
the digital gear i own is very powerful.
much more powerful than my analog stuff. not alive though.
creaky, limited, occasionally frustrating but usually rewarding if you are patient with it - the analog stuff really does “live”, just like dr. bob told us. 
xout!