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Few Questions about ADAU1787

I would like to do experiments about adaptive noise control on earbuds by using ADAU1787, here are my question!  

1. There is no FXLMS and other blocks in the tree toolbox of SigamaStudio, is that because 1787 only has NLMS block? 

2. Can I build my own block? I mean can I use my own algorithm? 

3. I would like to use FXLMS algorithm, no block and what if I cannot build my own block, what should I do?