i'd like to reduce the sampling frequency of the ADAU1701 to have more processing power for low frequency signal processing.
So if i reduce to e.g. 16kHz sampling frequency via 'Set system sampling rate' (see attached picture) and/or 'Propagate sampling rate', the ADC sampling rate should also be reduced. But if i measure the amplitude response (analog in > no processing > analog out), there is no difference in the amplitude response when configured to 48kHz !?
As a test i got a 10kHz analog signal at the input and have this also at the output (sampling = 48kHz). Now i set the sampling rate to 16kHz and the 10kHz signal appears stable at the output (after pressing 'Link Compile Download). How can this be ?