Given two analog audio oscillators running off of a common power supply, they are each tuned very close to the same frequency, but not quite, and they are both producing a sine wave at the same amplitude. Is it their nature to pull each other in tune with themselves and eventually lock with each other?
Now, given the same two oscillators, same conditions, except that now they are each on their own power supply. Will it still be their nature to pull each other in tune with themselves and eventually lock with each other?
Riding the dual-oscillator horse once again ??? lolll
No, I don’t believe so. Osc’s are not related to one another other than by 1-2 sync switch on the Voyager. They are calibrated separately as close as possible within the analog realm, which is closer in specs than with the electronics of the seventies.
My 1-2 oscillators are very close to one another, 3 not so much it seems. Sometimes I get the feeling on my 24/24 on Voyager that they sync perfectly when tweaking Osc2 knob to just the right spot (no audible frequency beat for very long time), then I come back a couple of hours later, and suddenly I can hear the drift, and this time they are hard to match perfectly.
There’s not such thing to me as pulling themselves together and eventually locking in a match.
That’s my outsider’s point of view. Insiders may have access to some technical info not available at large.
I see no connection between the power supply and the oscillator frequency and there is no reason for there to be a dependency on the frequency of the two oscillators.
Yes oscillators can lock together on a common supply. It is a common dread of synthesizer designers as it sounds very unpleasant. It doesn’t sound anything like hard sync.
The minimoog model D and modulars happen to have a dirty enough power supply that knocks oscillators out of lock.
During the minimoog days they designed a replacement ultra-clean power supply. The oscillators locked and that design was abandoned.
As for independent power supplies the answer is it is an expensive solution to a simple problem.
I would think that it might be the various different traces and leads that are between each oscillator and the power supply that might have an effect on the lack of movement towards unity of oscillator speed.
Yes.
The current drawn by the oscillators is not 100% the same all the time within the cycle. So the change the available power for the other oscillator, if the power supply is not able to adjust to that or if the power supply is not linear and 100% stable anyway.
No.
But also a single good power supply will be enough.
