  We generalize the free Fermi-gas formulation of certain 3d ${\cal N}=3$
supersymmetric Chern-Simons-matter theories by allowing Fayet-Iliopoulos
couplings as well as mass terms for bifundamental matter fields. The resulting
partition functions are given by simple modifications of the argument of the
Airy function found previously. With these extra parameters it is easy to see
that mirror-symmetry corresponds to linear canonical transformations on the
phase space (or operator algebra) of the 1-dimensional fermions.
