loading {TAIL ~ volume control values} corresponding to the audio output port stored in a memory unit when the external audio reproduction unit is plugged in {HEAD ~ the audio output port}; and 
loading { TAIL ~ volume control values } corresponding to the audio output port stored in a memory unit when the external audio reproduction unit is plugged in { HEAD ~ the audio output port } ; and
OTH 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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH