When {TAIL ~ a direct current gain} of one is desired, the first delayed signal output from the first delay unit 201 is transmitted to {HEAD ~ a reference delay unit} 205 
When { TAIL ~ a direct current gain } of one is desired , the first delayed signal output from the first delay unit 201 is transmitted to { HEAD ~ a reference delay unit } 205
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH