On Tue, Jan 26, 2010 at 11:02:58AM -1000, Joel Roth wrote:
> Just to underline that, gain controls are usually pots
> 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 ! _______________________________________________ Linux-audio-user mailing list Linux-audio-user@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Wed Jan 27 00:15:07 2010
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