Digital Filter in V1000

[nedyong]

Hi:

  this is my first post at this Forum
  I'm now  programing the V1000 to implement some digital filter.I have tried to implemt some IIR Low pass and high pass filter.
  I found that for the 1st order design, it seems to work fine.( I use MATLAB's fdatool to generate the filter coefficient)
  But for the 2nd order design ,the output sound distorted badly,I dont know whats wrong. But i guess it maybe the limit of the MAC coefficent range?
 
  Does anyone has experience using V1000 for equalizer or filter? Maybe we can have some discuss!