  We report a polarized Raman study of Weyl semimetal TaAs. We observe all the
optical phonons, with energies and symmetries consistent with our
first-principles calculations. We detect additional excitations assigned to
multiple-phonon excitations. These excitations are accompanied by broad peaks
separated by 140~cm$^{-1}$ that are also most likely associated with
multiple-phonon excitations. We also noticed a sizable B$_1$ component for the
spectral background, for which the origin remains unclear.
