I faced the same problem.I
No Audio in EmulationStation, I got audio on Kodi.
I tried to change everything from the EmulationStation settings but I cannot get audio on the menu or in the emulators… Also when I try to use the CTRL-ALT-F4 shortcut, Press F6, can find my audio hardware.
through SSH, get the list of audio outputs with the command aplay -l. In my setup, I get:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC282 Analog [ALC282 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
I use the old version of the Nvidia Batocera 5.27
https://batocera.org/users/alexxandrefs/5.27-nvidia-legacy/