Multi build noise question

[Luke51411]

I'm working on a multi with a distortion, phaser, and chorus. I currently have the phase and chorus pcbs on the breadboard they are guitarpcb dr phybes (p90) and mini-me chorus. I'm running the phase into the chorus. When I switch the feedback on for the phaser I get noise from the chorus clock, it's a chirp sort of sound. Is this something that should sort itself out with careful wiring once boxed? It seems to be fine without feedback on the phase shifter. If the noise is inherent, I'll just leave the feedback switch off.

[juansolo]

Likely heterodyning clocks. One of the gotchas of multi-building. Not really a cure for it other than to try not to have too many clocks on common power in the same enclosure that are running at around the same speed.

[Luke51411]

Ok that's kind of what I figured. I guess I'll just remove the feedback switch since it seems fine without feedback.

[Luke51411]

Scientifically what causes heterodyning of the clocks? Is it just that the interaction between them effectively lowers the frequency?