Hi! I am interested in using FxLMS for the purpose of ambient noise reduction by active noise cancellation, and I noticed that the filtered NLMS filter had been added to SigmaStudio 3.13. However I can't figured out how it is supposed to work. I am guessing that for a feed forward ANC setup, signal from the reference microphone should go to pin0 and error microphone to pin1 of the FxNLMS. However what does pin2 do and what is the procedure to obtain an estimate of the correction for secondary path? Thanks!