Direct form I,                              df1                     df1
Direct form I transposed,                   df1t                    df1t
Direct form II,                             df2                     df2
Direct form II transposed,                  df2t                    df2t
Direct form FIR,                            fir                     fir
Direct form FIR transposed,                 firt                    firt
Direct form symmetric FIR (Type I),         symmetricfir (odd)      symfiro
Direct form symmetric FIR (Type II),        symmetricfir (even)     symfire
Direct form antisymmetric FIR (Type III),   antisymmetricfir (odd)  asymfi-r-o
Direct form antisymmetric FIR (Type IV),    antisymmetricfir (even) asymfi-r-e
Lattice AR,                                 latticear               latcar
Lattice allpass,                            latcallpass             latcall-pass
Lattice MA min. phase,                      latticema               latcma
Lattice MA max. phase,                      latcmax                 latcmax
Lattice ARMA,                               latticearma             latcarm-a
Lattice coupled-allpass,                    latticeca               latcca
Lattice coupled-allpass power-complementary,latticecapc             latccap-c
State-space,                                statespace              statesp-ace
Scale values applied to a single section,   scalevalues1            scale1
Scale values applied to multiple sections}; scalevalues2            scale2
