Looking for a 2-channel high end volume control

For the OP, LDR type would not be the first choice, I agree. But then again, I just noticed that he is specifically looking for a chip type active control. Therefore, none of my suggestions of resistor based controls would be of interest. I don’t know why he specifically specifies to use a chip.

And Khozmo, which is excellent.

I never heard of Cirrus, but there is DACT, Goldpoint, Elma, Shallco, Noble, Penny and Giles, and etc, all of which make excellent two-channel balanced attenuators in your choice of impedance. (I am sure I left out a few other quality brand names.)  Depends upon how much you want to spend.  In addition to conventional resistor-based attenuators, like those mentioned, you can also think about attenuators based on light intensity and a photo-electric cell.  (I guess that is what danager points out above; I personally would stick with resistors.) No reason to mess with an 8-channel device when you only need 2.  If you don't already know much about attenuators, you might want to spend some time familiarizing yourself with the pluses and minuses of the various types, e.g., series, shunt, or ladder type, and e.g., stepped attenuators vs continuous types, etc.