{TAIL ~ The mixed signal} is coupled through a demultiplexer to respective inputs of first, second, third and fourth low pass filters, each of which has a cut off frequency which is {HEAD ~ one half} of the decoder passband 
{ TAIL ~ The mixed signal } is coupled through a demultiplexer to respective inputs of first , second , third and fourth low pass filters , each of which has a cut off frequency which is { HEAD ~ one half } of the decoder passband
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH