kakaroto% apt-cache rdepends libao2
libao2
Reverse Depends:
  quake2
  cmus
  zsnes
  xmms2-plugin-ao
  waon
  somaplayer
  shell-fm
  pytone
  mpg321
  mpd
  mpc123
  liquidsoap
  libsomaplayer0
  libsds0
  libao-ruby1.8
  libao-ocaml
  kadu-external-modules
  gnomoradio
  gcdmaster
  flac123
  d4x
  aldo
  vorbis-tools
  python-pyao-dbg
  python-pyao
  libao-dev
  cdrdao