I meet some problem on Bass and Treble shelving.
The below picture is the treble and bass shelving, Bass boost 5 and Treble boost 5 too, and I found that when the Bass and Treble boost together, the mid range frequence will decrease the boost.
I try to simulate this curve on the ADAU1452 SigmaStudio, but I can not find the correct block to make the curve,
I use SigmaStudio simulation block, and the picture likes below:
two curves look different, so I wonder how to use low and high shelving block and parametric block to make my curve looks like the first picture curve.