File list (Check if you may need any files):
PWSK_DSP
........\AFD_BUTT.M
........\AFD_CHB1.M
........\AFD_CHB2.M
........\AFD_ELIP.M
........\BLACKMAN.M
........\CAS2DIR.M
........\CASFILTR.M
........\CHEB1HPF.M
........\CIRCEVOD.M
........\CIRCONVT.M
........\CIRSHFTT.M
........\CONTENTS.M
........\CONV_M.M
........\CONV_TP.M
........\CPLXCOMP.M
........\DB2DELTA.M
........\DELTA2DB.M
........\DFS.M
........\DFT.M
........\DIR2CAS.M
........\DIR2FS.M
........\DIR2LADR.M
........\DIR2LATC.M
........\DIR2PAR.M
........\EVENODD.M
........\FREQS_M.M
........\FREQZ_M.M
........\HR_TYPE1.M
........\HR_TYPE2.M
........\HR_TYPE3.M
........\HR_TYPE4.M
........\HSOLPSAV.M
........\IDEAL_LP.M
........\IDFS.M
........\IDFT.M
........\IMPSEQ.M
........\IMP_INVR.M
........\LADR2DIR.M
........\LADRFILT.M
........\LATC2DIR.M
........\LATCFILT.M
........\LMS.M
........\MOD.M
........\MULAW_C.M
........\MULAW_E.M
........\OVRLPSAV.M
........\PAR2DIR.M
........\PARFILTR.M
........\PFE2RFZ.M
........\QUANTIZE.M
........\RF2PFEZ.M
........\SDIR2CAS.M
........\SIGADD.M
........\SIGFOLD.M
........\SIGMULT.M
........\SIGSHIFT.M
........\STEPSEQ.M
........\SUPTITLE.M
........\U_BUTTAP.M
........\U_CHB1AP.M
........\U_CHB2AP.M
........\U_ELIPAP.M
........\ZMAPPING.M