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RE: Ladder DACs for volume controls.

"DAC's operating in the analog domain???"

Yup. Some are, or at least were, just R-2R networks and transmission gates so you could use them for four quadrant multipliers (one axis being digital, the other the "reference voltage" port) with a little biasing.

I would like to offer you more detail but I'm not sure that I still have any information (or if I do, that I can find it!) as it was something I did over a quarter century ago.

Since this wasn't an audio project I have no idea what it might have "sounded" like but it is an example of using an R-2R DAC in the analog domain.

Regards, Rick


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