LF398 rate reducer / bit crusher problem

rosch · Joined: Oct 03, 2009 Posts: 152 Location: germany

hi! in order to not keep on hijacking the bugbrand thread i've started this new topic, referring to my post here

i've built the rate reducer posted by modularkomplex:
http://electro-music.com/forum/topic-11369-54.html

but have following problem: the cv from 40106 is fed through to the output.
well i'm not at all sure anymore that the effect works fine besides the feedthrough. i thought maybe the signal of my bass wasn't strong enough but the behaviour stays the same when plugging in a casio vz-1 which should bring enough without further amplification.

i also checked for solder bridges, with eyes and a knife- apparently nothing.

while having plugged in the vz-1, the cable of the pot disconnected again, and so the sound of the synthesizer was totally normal, like bypassed. putting the cable back to the pot brought back the (detuned-style) pitch modulation with the cv square instantly.

any ideas more than welcome- and sorry for the thread salad...
thanks!

rosch · Joined: Oct 03, 2009 Posts: 152 Location: germany

i breadboarded the circuit to be sure to have no solder bridges etc.

the result was just the same like before.
maybe it is a problem with some parts? i think if i had the 40106 put in the wrong way it wouldn't function at all, but when the pot is turned i can hear the pitch of the square change, so this should not be the problem.

but maybe there are differences between LF398's from different manufacturers?? i have a LF398N, purchased from Conrad.

i think i'll try Reichelt next, maybe that helps.
i have no idea what i could have overlooked here