If you have one at ~/.emulationstation/es_systems.cfg, make the same edit there.
I think that should about cover it? Now...
hoykey for retroarch
Edit your autoconfig file for your gamepad(s) at /opt/retropie/configs/all/retroarch/autoconfig/[gamepad device ID].cfg and remove all lines that look like these (your values will differ, and it may say axis where this says btn or vice-versa):
@lostless thankyou. This has been driving me crazy but you hit the nail on the head. I had a driver installed for a case that had the option for cooling that must have used those pins. I uninstalled the driver and it is working now.
Use Google translate to read my reply. That's what I did to read your issue...but in the future, try to post in English as more people will read and answer it. No disrespect to you or your language, it's just more common to use English as the middle of the road for everyone.
Go into the RetroPie Menu for audio by using the actual Retropie Menu, not the emulation station shortcut. Once you're in the RetroPie Menu, look for the audio options and switch the output from HDMI to 3.5" Audio jack.
The menu is easy to navigate, you'll see it.
The board is just an amplifier, but to make sure your audio output is set right/working, use a set of headphones to test it. If you hear sound, you know the issue is your amplifier.