simple gate/vca using logic?

[loss1234]

i have been messing around with getting a 4011 and a 4016 to create a simple vca (triggered by the guitar signal) but it doesnt seem to be working right (and the time i got it to work i took no notes!)

any ideas on what i might be doing wrong?

what i WAS trying to get to work was this

guitar signal (from a out of a buffer) into pin 1 of the 4011.
tie this pin 1 to pin 2. take pin 3 and invert it with a 40106 and then plug that into pin 13 of a 4016. pin 1 of the 4016 is the actual FX signal (end of the chain) and pin 2 is the output.

shouldnt this work? or does it only work for CV signals, not audio on regular 15/gnd psu?

thanks

[R.G.]

CD4011 expects a logic level signal. Guitar is not logic level.

CMOS can be biased for linear operation, but you don't mention any of that.

In any case, a VCA generally requires a gain controllable amplifier and even linear-biasd CMOS isn't all that gain controllable.

[loss1234]

i WAS actually trying to run these in linear mode yesterday but the results werent much better.
granted, i am not going for anything nice. the only reason i need this is to CUT Out the sound when the guitar isnt playing so you dont hear high pitch bleedthrough of one of the oscillators.

i think i might just use a vactrol circuit instead but i was thinking if i could get this work it would be a good thing to have on hand.

i was boosting the guitar so that it was peaking at around 5 or 6 volts when it was playing.


i am a bit confused as to why i can get the 4016 to turn audio going through it ON and OFF when i plug the output of an oscillator into the control pin. that is not really a straight logic signal (but it is a square)

maybe the trick would be to square the guitar signal up first?

thanks for the suggestions