Not AUX cord’s problem,because switch to next song is OK.
I have just confirmed one thing
Not have no voice, was became very low
I thought is system problem, so I reboot, after system before turning on and off and play my schedule, the volume is normal again, but I only want to add and subtract the volume, the sound become very low again, this situation seems to be only in the SD card should be so, but I also in the cross test
15:56 P.M.
Cross test over…i test 2 card conditions are the same,the SD card is ok
