> Roger Klaveness wrote:

(snip)
> ar filtgen asig, iftype, ibandtype, iripple, iorder, icorner2, icorner2
> 
> where
> iftype : filtertype 1=Butterworth,2=Chebychev,3=Bessel
> ibandtype : Bandtype 1=Lowpass , 2=Highpass, 3=Bandpass, 4=Bandstop
> iripple : ripple in dB for Chebychev filter
> iorder : order of filter
> icorner1 : cornerfrequency 1
> icorner2 = cornerfrequency 2, for Bandpass/Bandstop filters
(snip)

Would it make sense to allow the args to vary at k-rate ?
Clearly some args must be integers only, but it might open up the possibility
of  time-varying filter design, with all the goodies that implies -
conditional filters tested at k-rate, intermediate designs on a continuum
between 2 conventional designs, etc.