[sdiy] Adding a second VCO with level control

[Altitude]

Greets list,

Please excuse my ignorance if this is an obvious thing.

I regularly add a second VCO to my x0xb0xes and have been using a simple pot
with one leg as input, the other to ground as a way to control the level of
the signal however I have noticed that if I turn it ALL the way down, it
silences both VCOs since (I assume) it shorts the VCF input to ground.

  Can someone suggest an elegant way to deal with this?

Much Obliged,
Raph