I recently built a few more PSUs for my modular but I noticed the other day that the VCOs are ever so slightly unstable and seem to be modulated by other stuff on the power rail. I notice that Yusynth designed an oscillator with onboard regulators because of this problem.
I made sure there is plenty of headroom for each PSU
I presume VCOs are really sensitive to these forms of modulation.
I have heard mention clean and dirty power supplies. Should all VCOs VCAs and VCFs be hooked up to one PSU and all logic/lfos/modulators etc hooked up to a dirty supply?
Also is it a good idea to use shielded cable for power?