linuxaudio.org

On Tue, Jan 26, 2010 at 11:02:58AM -1000, Joel Roth wrote:
> Just to underline that, gain controls are usually pots

quoted text
> that *attentuate* the signal. The top setting (danger!

> ohnoes!) is just letting the signal through with no

> attenuation.

That would be true for most mixer faders and

for normal volume controls. But in that case

it's not done as in your drawing, but by using

the pot as a voltage divider:
    ____

   in   |

        r

        r

        r______

        r    out

        r

        r

    ____|______

     ground
The exception is the gain control in a mic

preamp where the pot is normally used as a

variable resistance (as in your drawing),

but there it is part of the feedback circuit.

There's normally no attenuation in the signal

path (except for a -20dB pad or something

similar).
Ciao,
--

FA
O tu, che porte, correndo si ?

E guerra e morte !

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