Write filter in second order section to Matlab fcf file
int ocmsp_writefcf_sos( const char * filename, const double * pSOS, UINT nsec, double gain, int fmt = OMSP_DEC )
Return OE_NOERROR if succeed, otherwise, non-zero error code is returned (OE_NULL_POINTER, OE_INVALID_SIZE or OE_BAD_PARAM)
ocmsp_writefcf, ocmsp_writefcf_ss
ocmsp.h