Post by thetechnobear on Nov 15, 2018 17:22:25 GMT
actually not so sure again im backed to thinking its kind of summing...
but its a bit weird as far as i can tell it seems to be frequency is:
freq knob + (cv1knob * cv1) +/- cv2
where +/- means its seems to be bipolar , ie it can both increase and decrease the cutoff, where 2.5 is the centre. (its the bipolar nature, that made be think it was multiplying)
try this, remove cv1
2ATT in1=+5v -> cv2
set filter to around 12 o'clock 2att level1 to 12 o'clock
now: take out the patch wire , notice is about the same put it back in now turn slow and a very small amount anti clockwise, filter is closed return to 12 oclock now turn slow and a very small amount clockwise, filter is opened
the thing which makes it trick to hear whats going on, its its such small amount are moving the cutoff, and there is not a huge range on the filter..
importantly, you'll note that the same happens with different positions of the freq knob, so its an offset. from there, you can then add cv1, and see its doing its normal thing ...
anyway not sure 100% thats whats going on... but in practice what i do is put an attenuated signal into cv2 and then 'mix' to taste