Ugoos AM6b Plus no audio AV output

I have a problem. I have a ugoos AM 6B plus TV box with the latest version of EmuElec 4.6. When I connect it via AV output to my CRT TV, the image is transmitted, but there is no sound. In the settings I tried all the options 0, 0.1, 1, 1.1. I rebooted after each save and manually set these values in the config. I changed audio drivers in retroarch. Nothing helped.
The cable and box are in good condition, since the sound works properly in the default system. It is not work only in EmuELEC. What am I doing wrong?