LTC1799 tuning problem

[okclave]

Hello!
So I've installed the LTC1799 on my Yamaha Vss-30. Brillant!
I actually have a 4 way rotary switch where I can select between the original clock and 3 octaves with the LTC1799 and a pot that acts as a pitch bend.
So I've got my octaves right and everything, but the funny thin is that if i touch the keyboard in the back or even the pot (it's got a plastic know) the tune seems to drop down... just by touching it!!
Is there any good way of isolating the circuit or doing something so it stays in tune?

I hope i was clear enough!
Cheers
Ezequiel

[Gordonjcp]

Sounds like hand capacitance.  You are a big wet bag of squashy conductive stuff.  You are pretty much grounded.  If you wave your hand near an oscillator, you act as one "plate" of a capacitor to ground.

You could try using screened cable to hook up your switches, and keep the leads as short as possible.