Never mind... There's a "mode" switch on the controller that needs to be toggled. Putting it here for posterity.

@BuZz
Thanks a lot, it's working now! :)

@caver01 Yea i only have a 2 player setup atm but you got the gist.

@Swizz You can do all that via RetroPie without having to reboot - RetroPie is just a software package on top of Raspbian (or another distro).

Berryboot shares a kernel between all distros, and /boot/config.txt management is slightly different so configuration is different (The different kernel version from Raspbian can cause issues specific to Berryboot). Although we provide a Berryboot image we don't really support it.

@caver01
The 106 roms in question don't work in AdvMame .94 either :-(

Good idea about switching the wires on the trackball. I'll take a look and see if it's an easy fix - then it will be right for everything going forward. Thanks for the idea!

Because it's close to what I'm using and I can't find help anywhere :(

@darkmenace i'm afraid you can't adjust it without pulling the repository, changing the code and recompiling. not that you'd want to - it delays it but the sound gets way out of sync. it's arguably worse than the distortion.

Let's stick to the other thread for anything else: https://retropie.org.uk/forum/topic/2612/mortal-kombat-2-3-umk3-audio

@dudleydes
Thanks a lot, added /home/pi/RetroPie/BIOS/mame2003/samples/
in /opt/retropie/configs/mame-mame4all/mame.cfg and it works fine!

@Rabidtrout actually @dudleydes already said to do this earlier in the thread. :)

Please open a new issue for an unrelated problem so it's easier for people to find when searching etc.

@Panglin Please reply to my questions if you want help to fix this. Thanks.

@gothats yeah, I noticed it stopped to work as expected. I'll check what's wrong and let you know if I discover something.

I was seeing a similar issue with my setup and after enabling some script debugging I was seeing the following result from the dpkg-query command:

pi@retropie:~/RetroPie-Setup $ dpkg-query -W '--showformat=${Status} ${Version}' lsb-release
Segmentation fault

This lead me to some articles about refreshing this package so after running:

pi@retropie:~/RetroPie-Setup $ sudo apt-get --reinstall install dpkg

I was back to being able to successfully complete a run of the /home/pi/RetroPie-Setup/retropie_packages.sh command again.

@rbaker no offence to OP but I'd be willing to bet that most people who are running Windows 10 iot on the pi would probably know the simple steps of recreating a folder if the got to the point of getting retropie functioning on iot ;)

@dawtyne10 Were you ever able to find a solution. I have the exact same issue as you when I exit Kodi to emulation station. I am running my roms, and I'm pretty sure therefore Kodi, from a usb rather than from the micro sd, so I've always attributed it to that. Hoping there was some kind of solution. Thanks.

@mercifulhacker yes I can navigate menu and select the games but once game has loaded nothing works to allow me to get into controls I understand what your saying I'll have a good read and thanks for the replies I'm sure I'll get there eventually!!

Any news on this? Same problem here. Any other controller that is working better?