  In this paper we extend some results from our earlier papers on wave-front
sets, concerning wave-front sets of Fourier-Lebesgue and modulation space
types, to a broader class of spaces of ultradistributions, and relate these
wave-front sets with the usual wave-front sets of ultradistributions.
  Furthermore, we use Gabor frames for the description of discrete wave-front
sets, and prove that these wave-front sets coincide with corresponding
continuous ones.
