I'm getting an unwanted crackle

[PatStyles]

So I'm trying to use the MF-101 with the CP-251 to randomly set filter cutoff values at a regular time frequency.

On the CP-251, I plug the Out1 from the Sample and Hold to the In of an attenuator. Then I plug the Out from the attenuator to the cutoff control input of the MF-101.

I plug a guitar to the audio input of the MF-101 and the amp to the audio output.

What I expect is for the sample and hold to grab a value from the noise generator and pass it through the attenuator to the control of the filter cutoff. I use the LFO on the CP-251 to set the frequency of the samples.

This all works as expected, except that I hear a distinct crackle sound every time the cutoff is changed.

Would anyone of you experts have any idea why I am getting this distortion? It's very noticable and is ruining what seems to be a patch with some real potenial.

thanks,
.pat

[Jebus0000]

Try sending the CV through the Lag section as well. Turn the Rise knob up slightly and you should get rid of the clicking(if this is the problem I think it is) The cutoff frequency is changing so fast that there is an audible click whenever it changes. The Lag feature will slow the change or round it off a little to get rid of the click.

[PatStyles]

Thanks! It worked great. Just running the signal through the lag circuit was enough to reduce the crackle. Twisting the knob eleminated the problem altogether.

.p