I am using ADAU1452 SigmaDSP to implement an algorithm derived from NLMS adaptive algorithm. It is a dual-path algorithm,where it stores the background (shadow) coefficients. It would be helpful if I can get a new interface for the existing NLMS with provision to take FIR coefficients as input and adapted coefficients as output. I am attaching the SHNLMS (shadowed NLMS) algorithm here,and the MATLAB design for the same. Looking forward to you.