Hex VC mixer

[tomg]

It's a pretty cool circuit and everybody ought to have
one or two in their modular. But before somebody starts 
building synthesizers around this thing remember there
are no caps to block DC, so your CV is going to go right
through the fets ( read it's gonna thump).  It does not go 
negative so don't expect anything to be going on below 
0V and lastly there is no way to compensate for cross-
over distortion so really low audio levels will show a 
tiny bit of distortion... If you except it for what it is fine.
But don't expect everything.....you won't get it.

Tom