At the same time, {HEAD ~ a string} of synthetic speech samples is transmitted to {TAIL ~ an audio server} 
is transmitted to
At the same time , { HEAD ~ a string } of synthetic speech samples is transmitted to { TAIL ~ an audio server }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL