A system for demodulating an angle modulated wave which is picked up from a recording medium on which is recorded an audio signal which is {HEAD ~ angle} modulated on {TAIL ~ a carrier wave}, said system comprising: 
A system for demodulating an angle modulated wave which is picked up from a recording medium on which is recorded an audio signal which is { HEAD ~ angle } modulated on { TAIL ~ a carrier wave } , said system comprising :
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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH