Hello,
I'm building a "digitally controlled analog mixer" with some mic inputs and stereo linear inputs. I need each channel to have a volume slider.
We considered the PGA4311, but a) it's expensive and b) it has some extra features we don't need. Our microphones are going to be differential, so we are putting an opamp (NE5523) on the input of the mics anyhow, so we have plenty of gain already. The PGA4311 has additional gain that we don't really need.
So we are now considering the LM1972. Will this work for my needs? I know it has some attenuation, and it has a "mute" function, but will it work as expected as a "volume control" for each of the mics and inputs? Will we be able to create the curve you'd most likely associate with a volume slider on a mixer board where all the way up is on and all the way down is off? Or will there be an issue with the sliders not going from 0 to 100?
Hopefully my question is clear enough. Please feel free to ask me if you need clarification. Thank you for your time!
Jay