[sdiy] Any idea how Behringer Eurorack volume controls work?

[Tom May]

Edu Silva <bahi0387 at terra.com.br> writes:

> Tom May wrote:
> > 
> > I just can't puzzle out how this thing is working.  Anybody have any
> > ideas?
> 
> 
> 
> Maybe something like this?
> 
> 
> in                    (+)|\
> --[R1 ]--+---------------| \
>          |               |  \_________ out
>          |            (-)|  /     |
>     vol | |           +--| /      |
>     +-->| |           |  |/       |
>     |   |_|           |           |
>     |    |            |           |
>     |    +-[R2 ]--||--+---[R3 ]---+
>     |             C1
>    _|_
>     -
>    gnd

Big grin!  I bet that is it, I have reason to believe the capacitor is
in there because the DC level at the R2 end of the pot takes a while
to stabilize when recovering from clipping.  I figured that end had to
be connected to the output somehow, but none of my desperate scribbles
provided the right signals at all three pot terminals.

Big thanks to Don, too, for sussing out and explaining the advantages
of the circuit, although I would have expected you to list the
disadvantages, too, Don :-)

Tom.