I'm using an STM32F103 acting as mass storage flash and a FatFS file system on board which allows me to take a hex file so I can upload this to a ADAU1761. Looking at the output from the SigmaStudio I see that when I use Graphic EQ eight order shelving I get what seems to be 20 parameters per band. The filter is described as a Holters/Zolser's. I want to calculate the values using the PC so I have a few questions.
1) What is the structure of the filters as it seems to be using four sets of coefficients
2) What calculations apply (how to calculate on PC)