I don’t want to sound overly defeatist, but the only oscillators which do that are voices, not oscillators. Oscillators always run, and we only perceive them as stopped if we close a filter and/or VCA after them. (Okay, okay, yes, there are oscillators which can be stopped e.g. grinding Generate 3 to a halt by messing with its through-zero input, but in general they always run.
)
Do you not have a filter and/or VCA downstream?
) Do you not have a filter and/or VCA downstream?

