a processing part configured to provide said signal input by said external input unit to said device and configured to provide to said external output unit, in real time, {HEAD ~ a signal} having {TAIL ~ a same contents} as said signal being input by said external input unit, wherein 
having
a processing part configured to provide said signal input by said external input unit to said device and configured to provide to said external output unit , in real time , { HEAD ~ a signal } having { TAIL ~ a same contents } as said signal being input by said external input unit , wherein
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH