Now that I have taken those screenshots, I can at least search the ICs to see what they're for.
Yes, I don't already know by name what each chip does, even these likely very common ones - sorry.
AMS is to provide voltage references, but what is the mentioned 8 pin LM358 for?
From wiki:
"The LM358 is designed for general use as amplifiers, high-pass filters, low band pass filters, and analog adders."
Which of those functions is it serving here? I'm assuming it's not HP/LP filtering (although I might be wrong - maybe it is there just to remove some noise), so that leaves Amplifier (but amplifying what, input signals?) and it's probably not an analog adder, but when you say "it's probably not this" without knowledge, you are more likely to be wrong than right!