kind like to know the simplest way to have 2 more ADC inputs on the ADAU1701. And how could I configure 3 different filters and recall it over push-buttons when running in self-boot mode.
Filter 1 - 2nd. order hi/low pass 20Hz - 200 Hz;
Filter 2 - 2nd. order hi/low pass 200Hz - 2000 Hz;
Filter 3 - 2nd. order hi/low pass 2000Hz - 20000 Hz