[sdiy] Attenuators

[Michael Both]

Is there anything more to an attenuator (gain from 1 down to 0) than a
pot wired up with one leg to the input signal, one leg to ground, and
the wiper to the output? It seems that this might introduce the
possibility of "crackling" if audio signals are passed through, not to
mention the varying impedance.

How have attenuators "classically" been implemented? I can't seem to
find any schematics anywhere, which seems to be indicating that the  pot
approach is taken.

Thanks for any help

Mike