Doepfer

Hi, 

Quick question,

Does the Doepfer system use both a clean and dirty GND? The three 
GND pins suggest it, but perhaps not?.

If there is a separate dirty gnd pin, which of the three pins 
lsbelled GND is considered the dirty gnd? (The one next to -V, the 
one next to +V, or the one in the middle?)

Continuing, if there is a dual gnd setup to allow a separate return 
path for noisy modules and components: Do all Doepfer modules 
respect this division of the return paths?

Finally, if there is no specific dirty GND pin defined by Doepfer, 
have any of you gone ahead and made one of the three into one for 
your system? If so, which pin did you choose?

Thank you,

Randal