svoid dm_pulseAudio_setDefaultSinkAndSwitchAllClients(int sinkIndex) {
  pulseAudio_setDefaultSink(sinkIndex);
  for (O program : (Cl) dm_requireAndCall("#1027073/ListPlayingPrograms", 'list))
    pulseAudio_moveSinkInput(getInt index(program), sinkIndex);
}

svoid dm_pulseAudio_setDefaultSinkAndSwitchAllClients(S sinkName) {
  Int index = reverseLookupIC(dm_systemAudioSinkNames(), sinkName);
  if (index != null) {
    print("Switching default sink to: " + sinkName);
    dm_pulseAudio_setDefaultSinkAndSwitchAllClients(index);
  }
}

Began life as a copy of #1027083