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