Thus, {HEAD ~ the sampling frequencies} of all the six audio data signals DL, DR, {TAIL ~ DC}, DSW, DSL and DSR are the same at the stage that these audio data signals are fed into the digital signal generation circuit 54 
Thus , { HEAD ~ the sampling frequencies } of all the six audio data signals DL , DR , { TAIL ~ DC } , DSW , DSL and DSR are the same at the stage that these audio data signals are fed into the digital signal generation circuit 54
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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