We are using an external microcontroller to control the SignamDSP ADAU1442. I've done all the filter coefficients calculations by following the algoritms in the help file, except for the Chebyshev filters, on which the help file failed to mention. Another issue is with calculating the Compressor gain table. I could find some info on those attach/decay, time constant etc. in the help file as well as here, but can't find anything on how to calcuate the 33 gain values with a given graph (points). It seems with/without soft knee can affect those gain values, but the rational behind it is also unknown. So the question is how exactly those gains values are calculated? Thanks.