$SPCTOOLS= in spline directory of Dennis Brown's <a href="ftp://svr-ftp.eng.cam.ac.uk/pub/comp.speech/tools/spctools">SPCtools</a>
$TFTB= try <a href="http://www-isis.enst.fr/Applications/tftb/iutsn.univ-nantes.fr/auger/tftb.html">Time-Frequency Tool box</a>


signal >> Signal processing
Signals
 diric 
 gauspuls 
 pulstran 
 tripuls 
 rectpuls 
 sawtooth 
 sinc 
 square 
 sinetone sinewave
 chirp 
 vco modulate demod= $TFTB
 strips 
 specgram 
 periodogram stft synthesis hurst
 buffer
Filtering
 fftfilt 
 filtfilt 
 filtic 
 latcfilt 
 sgolayfilt 
 sosfilt 
 medfilt1 
 spencer
 fractdiff
Filter analysis
 freqs freqs_plot
 freqspace 
 freqz freqz_plot
 grpdelay 
 impz 
 zplane 
Filter conversion
 ac2poly 
 poly2ac 
 ac2rc 
 rc2ac 
 poly2rc 
 rc2poly 
 convmtx 
 latc2tf 
 residuez 
 sos2ss 
 sos2tf 
 sos2zp 
 ss2sos 
 ss2tf 
 ss2zp 
 tf2latc 
 tf2sos 
 tf2ss 
 tf2zp 
 zp2sos 
 zp2ss 
 zp2tf 
 polystab 
IIR Filter design
 besself 
 butter 
 cheby1 
 cheby2 
 ellip
 ncauer
 maxflat 
 yulewalker
 buttord 
 cheb1ord 
 cheb2ord 
 ellipord 
 besselap 
 sftrans
 bilinear 
 impinvar 
FIR filter design
 fir1 
 fir2 
 fircls 
 fircls1 
 firls 
 firrcos 
 intfilt 
 kaiserord 
 cremez 
 remez 
 remezord 
 sgolay 
Transforms
 czt 
 dctmtx 
 dct2 
 idct2 
 dct 
 idct 
 dftmtx 
 hilbert 
 rceps 
 cceps 
 icceps 
Power spectrum analysis
 pwelch 
 tfe 
 cohere 
 csd 
 pburg 
 pcov pmcov pmtm pmusic= $SPCTOOLS
 pyulear 
 xcorr
 xcorr2 
 xcov 
 spectral_adf spectral_xdf
 __power
Window functions
 bartlett 
 blackman 
 boxcar 
 chebwin flattopwin
 hamming 
 hanning hann
 kaiser 
 triang 
 gaussian gausswin
 rectangle_lw
 rectangle_sw
 triangle_lw
 triangle_sw
System identification
 arburg 
 arcov= use <code>ar_covar</code> $SPCTOOLS
 armcov= use <code>ar_mdcov</code> $SPCTOOLS
 prony= use <code>ar_prony</code> $SPCTOOLS
 aryule 
 invfreq
 invfreqs 
 invfreqz 
 levinson  durbinlevinson
 lpc 
 rlevinson 
 stmcb 
 diffpara
 arch_rnd arch_fit arch_test
 arma_rnd autoreg_matrix autocor autocov
Sample rate change
 decimate 
 interp 
 resample 
 upfirdn 
Compatibility
 buttap= use <f>butter</f><code>(n,1,'s')</code>
 cheb1ap= use <f>cheby1</f><code>(n,Rp,1,'s')</code>
 cheb2ap= use <f>cheby2</f><code>(n,Rs,1,'s')</code>
 ellipap= use <f>ellip</f><code>(n,Rp,Rs,1,'s')</code>
 lp2bp= use <f>sftrans</f>
 lp2bs= use <f>sftrans</f>
 lp2hp= use <f>sftrans</f>
 lp2lp= use <f>sftrans</f>
 yulewalk=use <f>yulewalker</f>

