pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_VOLUME);
pa_tagstruct_putu32(t, tag = u->ctag++);
pa_tagstruct_putu32(t, u->device_index);
pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_VOLUME);
pa_tagstruct_putu32(t, tag = u->ctag++);
pa_tagstruct_putu32(t, u->device_index);