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Problems with Cynare filter

2008-04-18 by creatorlars84

Hello everyone -- This is my first post on the group, but I've been
watching for a while.

I finally got around to wiring up my Cynare and everything seems to be
functioning correctly except the VCF. There seems to be some signal
bleedthru. With nothing connected to VCF In, and listening to VCF
Out, I can hear the oscillators faintly, and also a loud impact thump
when the module receives a trigger. I've checked all of my
connections thoroughly and everything looks okay, so I'm a bit confused.

It appears that the filter itself only has a minimal effect on this
bleedthru noise. If I listen to +15v, I hear the same signal that is
bleeding thru.

I've uploaded a sound sample here of the VCF Out with nothing
connected to VCF In, and a trigger sequence being played:
http://www.lzxindustries.com/bad_cynare.mp3


Do I have bad transistors in the circuit? Mix out, noise, VCA in/out
all seem to be functioning perfectly, as does the filter (except of
course the bleedthru signal.) If you have suggestions to point me in
the right direction(s) I would greatly appreciate it.

Thanks,
Lars Larsen
creatorlars@...

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