The first attenuator is switched after {HEAD ~ a syllable delay}, and {TAIL ~ the second attenuator} is switched after a yet longer delay 
The first attenuator is switched after { HEAD ~ a syllable delay } , and { TAIL ~ the second attenuator } is switched after a yet longer delay
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH