Re: Anyone here familiar with so-called 'zipper noise' in audio remote/automation level control applications ?

Eeyore wrote:
If so there's a quick question I'd like to run by you.

Graham

The first digital pots were rather bad; two sources (1) not many steps = large step function in "analog" output and (2) large gate capacitance coupling on/off step voltage to source/drain.
The newer ones are better, but i would use a scope synched with the digital command pulse, tie each end of pot to resistor to ground where resistance is equal to that of pot; scope probe to "tap" / "output".
Should give you an idea as to how good/bad that coupling is.
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