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