repeating {TAIL ~ the steps} of measuring, identifying and displaying at {HEAD ~ intervals} during the transforming of the elemental sound units to audio signals 
repeating { TAIL ~ the steps } of measuring , identifying and displaying at { HEAD ~ intervals } during the transforming of the elemental sound units to audio signals
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH